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IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 430
OPEN NEWTON - COTES QUADRATURE WITH MIDPOINT
DERIVATIVE FOR INTEGRATION OF ALGEBRAIC FUNCTIONS
T. Ramachandran1
, R.Parimala2
1
Assistant Professor, Department of Mathematics, M.V.Muthiah Government Arts College for Women,
Tamil Nadu, India
2
Research Scholar, PG &Research Department of Mathematics, Government Arts College (Autonomous),
Tamil Nadu, India
Abstract
Many methods are available for approximating the integral to the desired precision in Numerical integration. A new set of
numerical integration formula of Open Newton-Cotes Quadrature with Midpoint Derivative type is suggested, which is the
modified form of Open Newton-Cotes Quadrature. This new midpoint derivative based formula increase the two order of
precision than the classical Open Newton-Cotes formula and also gives more accuracy than the existing formula. Further the
error terms are obtained and compared with the existing methods. Finally, the effectiveness of the proposed algorithm is
illustrated by means of a numerical example.
Key Words: Numerical Integration, Open Newton-Cotes formula, Midpoint Derivative, Numerical Examples.
----------------------------------------------------------------------------***----------------------------------------------------------------------------
1.INTRODUCTION
Numerical integration is the process of computing the value
of a definite integral from a set of numerical values of the
integrand. The process of evaluation of integration of a
function of a single variable is sometimes called Mechanical
Quadrature. The computation of a double integral of a
function of two independent variables is called Mechanical
Cubature. There are many methods are available for
numerical integration [1]. Consider the definite integral
I f = f x dx
b
a
1
where the function f(x) is continuous in the closed interval
[a,b], so that the integral I(f) exists. An efficient formula is
developed for computing approximate value of the integral
using only values of the integrand f(x) at points x โˆˆ [a,b]. To
approximate the integral I(f),we integrate exactly piecewise
polynomial approximations of f(x) on the interval [a,b].
Generally, a quadrature rule has the form,
f x dx
b
a
โ‰ˆ ๐‘ค๐‘– ๐‘“ ๐‘ฅ๐‘– (2)
๐‘›
๐‘–=0
Where there (n+1) distinct points x0 < x1 < โ€ฆ < xn and
(n+1) weights w0 ,w1 , ... , wn within the interval [a,b].
The error of approximation is given as,
En f = f x dx
b
a
โˆ’ ๐‘ค๐‘– ๐‘“ ๐‘ฅ๐‘– (3)
๐‘›
๐‘–=0
1.1 Definition
An integration method of the form ( 3) is said to be of
order P, if it produces exact results (En[f] = 0) for all
polynomials of degree less than or equal to P [10].
In Open Newton-cotes rule, the end points of the
interval is excluded in the function evaluation,i.e,
f x dx
b
a
= ๐‘ค๐‘– ๐‘“ ๐‘ฅ๐‘– โ‰ˆ ๐‘“ ๐‘ฅ ๐‘‘๐‘ฅ
๐‘ฅ ๐‘›+1
๐‘ฅโˆ’1
(4)
๐‘›
๐‘–=0
for given n+1 distinct points x0 < x1 < ... < xn and
n+1 weights w0, w1, ..., wn over the interval (a , b) with
xi = a + ( i + 1) h, i = 0,1,2,...,n and โ„Ž =
๐‘โˆ’๐‘Ž
๐‘›+2
[ 7 ] .
Therefore, the Open Newton cotes rules are given as
follows,
If n = 0;
f x dx
b
a
= b โˆ’ a f
a + b
2
+
(๐‘ โˆ’ ๐‘Ž)3
24
๐‘“"(๐œ‰), (5)
where ๐œ‰ โˆˆ ๐‘Ž, ๐‘ .
If n = 1;
f x dx
b
a
=
b โˆ’ a
2
f
2a + b
3
+ f
a + 2b
3
+
(๐‘ โˆ’ ๐‘Ž)3
36
๐‘“"(๐œ‰), (6)
IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 431
where ๐œ‰ โˆˆ ๐‘Ž, ๐‘ .
If n = 2;
f x dx
b
a
=
b โˆ’ a
3
2f
3a + b
4
โˆ’ f
a + b
2
+ 2f
a + 3b
4
+
14
45
b โˆ’ a
4
5
๐‘“ 4
๐œ‰ , (7)
where ๐œ‰ โˆˆ ๐‘Ž, ๐‘ .
If n = 3;
f x dx
b
a
=
b โˆ’ a
24
11f
4a + b
5
+ f
3a + 2b
5
+ f
2a + 3b
5
+ 11f
a + 4b
5
+
95
144
b โˆ’ a
5
5
๐‘“ 4
๐œ‰ , (8)
where ๐œ‰ โˆˆ ๐‘Ž, ๐‘ .
In the closed Newton-cotes quadrature, the endpoints are
included; whereas the open Newton- cotes quadrature,
only the interior points are included. The corrected open
Newton-cotes quadrature has higher precision than the
classical quadrature rule. There are so many works has
been done on the numerical improvement of Newton-
cotes formulas.
Dehghan et al., presented an improvement of open,
semi-open ,closed ,first and second kind [4 โ€“ 6, 8, 9]
Chebyshev Newton- cotes quadrature rules. In the
recent years, Clarence O.E Burg and his companions
introduced a new family of derivative based rules [2, 3,
7]. In 2013, Weijing Zhao and Hongxing Li [11]
introduced a new family of closed Newton-cotes
quadrature with Midpoint derivative rules.
In this paper, a new family of open Newton-cotes
quadrature rule is described, which uses the derivative
v a l u e at the Midpoint with their error terms. Also
some numerical examples are given with their results
and comparison. The result shows that the new formulas
give better solution than the classical ones.
2 .OPEN NEWTON - COTES
QUADRATURE WITH MIDPOINT
DERIVATIVE
A new Open Newton - Cotes Quadrature rules with
Midpoint โ€“ Derivative is explained below which g i v e s
higher precision than the classical Newton-Cotes
Quadrature rules.
2.1 Theorem
Open Newton - Cotes Quadrature with Midpoint -
Derivative for (n=0) is
f x dx
b
a
โ‰ˆ b โˆ’ a f
a + b
2
+
(๐‘ โˆ’ ๐‘Ž)3
24
๐‘“"
๐‘Ž + ๐‘
2
(9)
The precision of this method is 3.
Proof: Since the rule (9) has the degree of precision 1.
Now we verify that the rule (9) is exact for
f(x) = x2, x3.
When ๐‘“ ๐‘ฅ = ๐‘ฅ2
, ๐‘ฅ2
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
3
๐‘3
โˆ’ ๐‘Ž3
;
๐‘› = 0 โŸน ๐‘ โˆ’ ๐‘Ž
๐‘Ž + ๐‘
2
2
+
2 ๐‘ โˆ’ ๐‘Ž 3
24
=
1
3
๐‘3
โˆ’ ๐‘Ž3
.
When ๐‘“ ๐‘ฅ = ๐‘ฅ3
, ๐‘ฅ3
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
4
๐‘4
โˆ’ ๐‘Ž4
;
๐‘› = 0 โŸน ๐‘ โˆ’ ๐‘Ž
๐‘Ž + ๐‘
2
3
+
6 ๐‘ โˆ’ ๐‘Ž 3
24
๐‘Ž + ๐‘
2
=
1
4
๐‘4
โˆ’ ๐‘Ž4
.
Therefore, the precision of Open Newton - Cotes
Quadrature with Midpoint - Derivative is 3.
2.2 Theorem
Open Newton - Cotes Quadrature with Midpoint -
Derivative for (n=1) is
f x dx
b
a
โ‰ˆ
b โˆ’ a
2
f
2a + b
3
+ f
a + 2b
3
+
(๐‘ โˆ’ ๐‘Ž)3
36
๐‘“"
๐‘Ž + ๐‘
2
, (10)
The precision of this method is 3.
Proof: Since the rule (10) has the degree of precision
1.Now we verify that the rule (10) is exact for f(x) =
x2, x3.
When ๐‘“ ๐‘ฅ = ๐‘ฅ2
, ๐‘ฅ2
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
3
๐‘3
โˆ’ ๐‘Ž3
;
๐‘› = 1 โŸน
๐‘ โˆ’ ๐‘Ž
2
2๐‘Ž + ๐‘
3
2
+
๐‘Ž + 2๐‘
3
2
+
2(๐‘ โˆ’ ๐‘Ž)3
36
=
1
3
๐‘3
โˆ’ ๐‘Ž3
.
IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 432
When ๐‘“ ๐‘ฅ = ๐‘ฅ3
, ๐‘ฅ3
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
4
๐‘4
โˆ’ ๐‘Ž4
;
๐‘› = 1 โŸน
๐‘ โˆ’ ๐‘Ž
2
2๐‘Ž + ๐‘
3
3
+
๐‘Ž + 2๐‘
3
3
+
6(๐‘ โˆ’ ๐‘Ž)3
36
๐‘Ž + ๐‘
2
=
1
4
๐‘4
โˆ’ ๐‘Ž4
.
Therefore, the precision of Open Newton - Cotes
Quadrature with Midpoint - Derivative is 3.
2.3 Theorem
Open Newton - Cotes Quadrature with Midpoint -
Derivative for (n=2) is
f x dx
b
a
โ‰ˆ
b โˆ’ a
3
2f
3a + b
4
โˆ’ f
a + b
2
+ 2f
a + 3b
4
+
14
45
b โˆ’ a
4
5
๐‘“ 4
๐‘Ž + ๐‘
2
, (11)
The precision of this method is 5 .
Proof: Since the rule (11) has the degree of precision
3.Now we verify that the rule (11) is exact for
f(x) = x4, x5.
When ๐‘“ ๐‘ฅ = ๐‘ฅ4
, ๐‘ฅ4
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
5
๐‘5
โˆ’ ๐‘Ž5
;
๐‘› = 2 โŸน
๐‘ โˆ’ ๐‘Ž
3
2
3๐‘Ž + ๐‘
4
4
โˆ’
๐‘Ž + ๐‘
2
4
+ 2
๐‘Ž + 3๐‘
4
4
+
336
45
b โˆ’ a
4
5
=
1
5
๐‘5
โˆ’ ๐‘Ž5
.
When ๐‘“ ๐‘ฅ = ๐‘ฅ5
, ๐‘ฅ5
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
6
๐‘6
โˆ’ ๐‘Ž6
;
๐‘› = 2 โŸน
๐‘ โˆ’ ๐‘Ž
3
2
3๐‘Ž + ๐‘
4
5
โˆ’
๐‘Ž + ๐‘
2
5
+ 2
๐‘Ž + 3๐‘
4
5
+
1680
45
b โˆ’ a
4
5
๐‘Ž + ๐‘
2
=
1
6
๐‘6
โˆ’ ๐‘Ž6
.
Therefore, the precision of Open Newton - Cotes
Quadrature with Midpoint - Derivative is 5.
2.4 Theorem
Open Newton - Cotes Quadrature with Midpoint -
Derivative for (n=3) i s
f x dx
b
a
โ‰ˆ
b โˆ’ a
24
11f
4a + b
5
+ f
3a + 2b
5
+ f
2a + 3b
5
+ 11f
a + 4b
5
+
95
144
b โˆ’ a
4
5
๐‘“ 4
๐‘Ž + ๐‘
2
, (12)
The precision of this method is 5 .
Proof: Since the rule (12) has the degree of precision
3.Now we verify that the rule (12) is exact for f(x) =
x4, x5.
When ๐‘“ ๐‘ฅ = ๐‘ฅ4
, ๐‘ฅ4
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
5
๐‘5
โˆ’ ๐‘Ž5
;
๐‘› = 3 โŸน
๐‘ โˆ’ ๐‘Ž
24
11
4๐‘Ž + ๐‘
5
4
+
3๐‘Ž + 2๐‘
5
4
+
2๐‘Ž + 3๐‘
5
4
+ 11
๐‘Ž + 4๐‘
5
4
+
2280
144
b โˆ’ a
5
5
=
1
5
๐‘5
โˆ’ ๐‘Ž5
.
When ๐‘“ ๐‘ฅ = ๐‘ฅ5
, ๐‘ฅ5
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
6
๐‘6
โˆ’ ๐‘Ž6
;
๐‘› = 3 โŸน
๐‘ โˆ’ ๐‘Ž
24
11
4๐‘Ž + ๐‘
5
5
+
3๐‘Ž + 2๐‘
5
5
+
2๐‘Ž + 3๐‘
5
5
+ 11
๐‘Ž + 4๐‘
5
5
+
11400
144
b โˆ’ a
5
5
๐‘Ž + ๐‘
2
=
1
6
๐‘6
โˆ’ ๐‘Ž6
.
Therefore, the precision of Open Newton - Cotes
Quadrature with Midpoint - Derivative is 5.
3. THE ERROR TERMS OF OPEN
NEWTON-COTES QUADRATURE
WITH MIDPOINT DERIVATIVE
The Error terms of Open Newton-Cotes Quadrature with
Midpoint derivative are given below. The Error terms are
the difference between the exact value and the
quadrature rule.
3.1 Theorem
The Error term of Open Newton - Cotes Quadrature
with Midpoint - Derivative for (n=0) is
f x dx
b
a
= b โˆ’ a f
a + b
2
+
(๐‘ โˆ’ ๐‘Ž)3
24
๐‘“"
๐‘Ž + ๐‘
2
+
(๐‘ โˆ’ ๐‘Ž)5
1920
๐‘“(4)
(๐œ‰), (13)
IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 433
where ฮพ โˆˆ (a, b).This is fifth order accurate with the error
term is
๐ธ1 ๐‘“ =
๐‘ โˆ’ ๐‘Ž 5
1920
๐‘“ 4
๐œ‰ .
Proof:
Let ๐‘“ ๐‘ฅ =
๐‘ฅ4
4!
,
1
4!
๐‘ฅ4
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
120
๐‘5
โˆ’ ๐‘Ž5
;
b โˆ’ a f
a + b
2
+
๐‘ โˆ’ ๐‘Ž 3
24
๐‘“"
๐‘Ž + ๐‘
2
=
๐‘ โˆ’ ๐‘Ž
4! .16
3๐‘Ž4
+ 4๐‘Ž3
๐‘ + 2๐‘Ž2
๐‘2
+ 4๐‘Ž๐‘3
+ 3๐‘4
,
Therefore,
1
120
๐‘5
โˆ’ ๐‘Ž5
โˆ’
๐‘ โˆ’ ๐‘Ž
4! .16
3๐‘Ž4
+ 4๐‘Ž3
๐‘ + 2๐‘Ž2
๐‘2
+ 4๐‘Ž๐‘3
+3๐‘4
=
(๐‘ โˆ’ ๐‘Ž)5
1920
.
Therefore the Error term is,
๐ธ1 ๐‘“ =
๐‘ โˆ’ ๐‘Ž 5
1920
๐‘“ 4
๐œ‰ .
3.2 Theorem
The Error term of Open Newton - Cotes Quadrature
with Midpoint - Derivative for (n=1) is
f x dx
b
a
=
b โˆ’ a
2
f
2a + b
3
+ f
a + 2b
3
+
(๐‘ โˆ’ ๐‘Ž)3
36
๐‘“"
๐‘Ž + ๐‘
2
+
19(๐‘ โˆ’ ๐‘Ž)5
38880
๐‘“(4)
(๐œ‰), ( 14)
where ฮพ โˆˆ (a, b).This is fifth order accurate with the error
term is
๐ธ2 ๐‘“ =
19 ๐‘ โˆ’ ๐‘Ž 5
38880
๐‘“ 4
๐œ‰ .
Proof:
Let ๐‘“ ๐‘ฅ =
๐‘ฅ4
4!
,
1
4!
๐‘ฅ4
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
120
๐‘5
โˆ’ ๐‘Ž5
;
b โˆ’ a
2
f
2a + b
3
+ f
a + 2b
3
+
๐‘ โˆ’ ๐‘Ž 3
36
๐‘“"
๐‘Ž + ๐‘
2
=
๐‘ โˆ’ ๐‘Ž
7776
61๐‘Ž4
+ 80๐‘Ž3
๐‘ + 42๐‘Ž2
๐‘2
+ 80๐‘Ž๐‘3
+ 61๐‘4
.
Therefore,
1
120
๐‘5
โˆ’ ๐‘Ž5
โˆ’
๐‘ โˆ’ ๐‘Ž
7776
61๐‘Ž4
+ 80๐‘Ž3
๐‘ + 42๐‘Ž2
๐‘2
+80๐‘Ž๐‘3
+ 61๐‘4
=
19(๐‘ โˆ’ ๐‘Ž)5
38880
.
Therefore the Error term is,
๐ธ2 ๐‘“ =
19 ๐‘ โˆ’ ๐‘Ž 5
38880
๐‘“ 4
๐œ‰ .
3.3 Theorem
The Error term of Open Newton - Cotes Quadrature with
Midpoint - Derivative for (n=2) is
f x dx
b
a
=
b โˆ’ a
3
2f
3a + b
4
โˆ’ f
a + b
2
+ 2f
a + 3b
4
+
14
45
b โˆ’ a
4
5
๐‘“ 4
๐‘Ž + ๐‘
2
+
41(๐‘ โˆ’ ๐‘Ž)7
15482880
๐‘“(6)
(๐œ‰), (15)
where ฮพ โˆˆ (a, b).This is seventh order accurate with the
error term is
๐ธ3 ๐‘“ =
41(๐‘ โˆ’ ๐‘Ž)7
15482880
๐‘“(6)
(๐œ‰).
Proof:
Let ๐‘“ ๐‘ฅ =
๐‘ฅ6
6!
,
1
6!
๐‘ฅ6
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
5040
๐‘7
โˆ’ ๐‘Ž7
;
b โˆ’ a
3
2f
3a + b
4
โˆ’ f
a + b
2
+ 2f
a + 3b
4
+
14
45
b โˆ’ a
4
5
๐‘“ 4
๐‘Ž + ๐‘
2
=
๐‘ โˆ’ ๐‘Ž
3072.6!
4336๐‘Ž6
+ 474๐‘Ž5
๐‘ + 351๐‘Ž4
๐‘2
+ 556๐‘Ž3
๐‘3
+351๐‘Ž2
๐‘4
+ 474๐‘Ž๐‘5
+ 433๐‘6 .
Therefore,
(๐‘7
โˆ’ ๐‘Ž7
)
5040
โˆ’
๐‘ โˆ’ ๐‘Ž
3072.6!
4336๐‘Ž6
+ 474๐‘Ž5
๐‘ + 351๐‘Ž4
๐‘2
+ 556๐‘Ž3
๐‘3
+351๐‘Ž2
๐‘4
+ 474๐‘Ž๐‘5
+ 433๐‘6
=
41(๐‘ โˆ’ ๐‘Ž)7
15482880
Therefore the Error term is,
๐ธ3 ๐‘“ =
41(๐‘ โˆ’ ๐‘Ž)7
15482880
๐‘“(6)
(๐œ‰).
IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 434
3.4 Theorem
The Error term of Open Newton - Cotes Quadrature
with Midpoint - Derivative for (n=3) is
f x dx
b
a
=
b โˆ’ a
24
11f
4a + b
5
+ f
3a + 2b
5
+ f
2a + 3b
5
+ 11f
a + 4b
5
+
95
144
b โˆ’ a
5
5
๐‘“ 4
๐‘Ž + ๐‘
2
+
821(๐‘ โˆ’ ๐‘Ž)7
168. 55. 6!
๐‘“(6)
(๐œ‰), , (16)
where ฮพ โˆˆ (a, b).This is seventh order accurate with the
error term is
๐ธ4 ๐‘“ =
821(๐‘ โˆ’ ๐‘Ž)7
168. 55. 6!
๐‘“(6)
(๐œ‰).
Proof:
Let ๐‘“ ๐‘ฅ =
๐‘ฅ6
6!
,
1
6!
๐‘ฅ6
๐‘
๐‘Ž
๐‘‘๐‘ฅ =
1
5040
๐‘7
โˆ’ ๐‘Ž7
;
b โˆ’ a
24
11f
4a + b
5
+ f
3a + 2b
5
+ f
2a + 3b
5
+ 11f
a + 4b
5
+
95
144
b โˆ’ a
5
5
๐‘“ 4
๐‘Ž + ๐‘
2
=
๐‘ โˆ’ ๐‘Ž
375000.6!
52985๐‘Ž6
+ 57090๐‘Ž5
๐‘ + 44775๐‘Ž4
๐‘2
+ 65300๐‘Ž3
๐‘3
+44775๐‘Ž2
๐‘4
+ 57090๐‘Ž๐‘5
+ 52985๐‘6 .
Therefore,
(๐‘7
โˆ’ ๐‘Ž7
)
5040
โˆ’
๐‘ โˆ’ ๐‘Ž
375000.6!
52985๐‘Ž6
+ 57090๐‘Ž5
๐‘ + 44775๐‘Ž4
๐‘2
+ 65300๐‘Ž3
๐‘3
+44775๐‘Ž2
๐‘4
+ 57090๐‘Ž๐‘5
+ 52985๐‘6
=
821(๐‘ โˆ’ ๐‘Ž)7
168. 55. 6!
Therefore the Error term is,
๐ธ4 ๐‘“ =
821(๐‘ โˆ’ ๐‘Ž)7
168. 55. 6!
๐‘“(6)
(๐œ‰).
4 . NUMERICAL RESULTS
An approximate value of the following examples using
the open Newton- cotes quadrature with Midpoint
Derivative rules are determined and presented. To
demonstrate the accuracy of the results, we evaluate the
examples 1 โ€“ 4 and the Comparison of results is shown
in Tables 1 โ€“ 4..
๐“๐š๐›๐ฅ๐ž โˆ’ ๐Ÿ: ๐„๐ฑ๐š๐œ๐ญ ๐ฏ๐š๐ฅ๐ฎ๐ž ๐จ๐Ÿ ๐’† ๐’™
๐๐ฑ = ๐Ÿ”. ๐Ÿ‘๐Ÿ–๐Ÿ—๐ŸŽ๐Ÿ“๐Ÿ”๐ŸŽ๐Ÿ—๐Ÿ–๐Ÿ—
๐Ÿ
๐ŸŽ
n value
ONC MDONC
App. value Error App. value Error
n=0 5.436563657 0.952492441 6.342657600 0.046398498
n=1 5.741401936 0.647654162 6.345464564 0.043515340
n=2 6.361692569 0.027363529 6.388120309 0.000935789
n=3 6.369923849 0.019132249 6.388287352 0.000768746
๐“๐š๐›๐ฅ๐ž โˆ’ ๐Ÿ: ๐„๐ฑ๐š๐œ๐ญ ๐ฏ๐š๐ฅ๐ฎ๐ž ๐จ๐Ÿ
๐๐ฑ
๐Ÿ + ๐ฑ
= ๐ŸŽ. ๐Ÿ”๐Ÿ—๐Ÿ‘๐Ÿ๐Ÿ’๐Ÿ•๐Ÿ๐Ÿ–
๐Ÿ
๐ŸŽ
n value
ONC MDONC
App. value Error App. value Error
n=0 0.666666666 0.026480520 0.691358018 0.001789162
n=1 0.675000000 0.018147180 0.691460905 0.001686275
n=2 0.692063492 0.001083688 0.693023711 0.000123469
n=3 0.692377645 0.000769535 0.693044860 0.000102320
๐“๐š๐›๐ฅ๐ž โˆ’ ๐Ÿ‘: ๐„๐ฑ๐š๐œ๐ญ ๐ฏ๐š๐ฅ๐ฎ๐ž ๐จ๐Ÿ ๐Ÿ + ๐ฑ ๐Ÿ’
๐๐ฑ = ๐Ÿ. ๐Ÿ
๐Ÿ
๐ŸŽ
n value
ONC MDONC
App. value Error App. value Error
n=0 1.06250000 0.13750000 1.187500000 0.012500000
n=1 1.104938272 0.095061728 1.188271605 0.011728395
n=2 1.192708333 0.007291666 1.200000000 0.000000000
n=3 1.194933333 0.005066666 1.200000000 0.000000000
๐“๐š๐›๐ฅ๐ž โˆ’ ๐Ÿ’: ๐„๐ฑ๐š๐œ๐ญ ๐ฏ๐š๐ฅ๐ฎ๐ž ๐จ๐Ÿ ๐ž ๐ฑ
๐๐ฑ = ๐Ÿ”. ๐Ÿ‘๐Ÿ”๐Ÿ๐Ÿ–๐Ÿ’๐Ÿ“๐Ÿ”๐Ÿ’๐Ÿ
๐Ÿ
๐ŸŽ
n value
ONC MDONC
App. value Error App. value Error
n=0 4.14816890 1.88015657 6.162322472 0.199523169
n=1 5.05366896 1.30817667 6.174091231 0.187754410
n=2 6.24259421 0.11925142 6.352885779 0.008959862
n=3 6.27783380 0.08401183 6.354470691 0.007374950
From the results presented in Tables 1 - 4, it is
observed that the Open Newton-Cotes quadrature
with midpoint derivative g i v e s more accuracy than the
classical ones.
IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 435
5. CONCLUSION
In this work we applied the Open Newton-Cotes
Q u a d r a t u r e with Midpoint derivative over a finite
interval [a,b]. The Error terms gives two orders of precision
than the S t a n d a r d m e t h o d s .A numerical example is
given to clarify the proposed Algorithm.
6. REFERENCES
[1] K.E.Atkinson, An Introduction to Numerical
Analysis, John wiley and Sons , New York , NY ,
USA , Second Edition, 1989.
[2] Clarence O.E.Burg,โ€Derivative-based closed Newton-
cotes numerical quadratureโ€, Applied Mathematics and
Computations, vol.218, pp. 7052-7065, 2012.
[3] Clarence O.E.Burg, and Ezechiel Degny, โ€Derivative-
based midpoint quadrature rule, Applied Mathematics
and Computations, vol.4, pp. 228-234 , 2013.
[4] M.Dehghan, M.Masjed-Jamei, and M.R.Eslahchi,
โ€On numerical improvementof closed Newton-Cotes
quadrature rulesโ€, Applied Mathematics and
Computations, vol.165, pp. 251-260 , 2005.
[5] M.Dehghan, M.Masjed-Jamei, and M.R.Eslahchi,
โ€The semi-open Newton-Cotes quadrature rule and its
numerical improvementโ€, Applied Mathematics and
Computations, vol.171, pp. 1129-1140 , 2005.
[6] M.Dehghan, M.Masjed-Jamei, and M.R.Eslahchi,
โ€On numerical improvement of open Newton-Cotes
quadrature rulesโ€, Applied Mathematics and
Computations, vol.175, pp. 618-627 , 2006.
[7] Fiza Zafar,Saira Saleem and Clarence O.E.Burg,
โ€New Derivaive based open Newton- cotes quadrature
rules โ€,Abstract and Applied Analysis,Volume 2014 ,
Article ID 109138, 16 pages,2014.
[8] S.M.Hashemiparast, M.R.Eslahchi,M.Dehghan,
M.Masjed-Jamei,โ€On numerical improvement of the
first kind Chebyshev-Newton-Cotes quadrature rulesโ€,
Applied Mathematics and Computations, vol.174, pp.
1020-1032 , 2006.
[9]S.M.Hashemiparast,M.Masjed-Jamei,
M.R.Eslahchi,M.Dehghan,โ€On numerical improvement
of the second kind Chebyshev-Newton-Cotes
quadrature rules(open type)โ€, Applied Mathematics and
Computations,vol.180, pp. 605-613 , 2006.
[10]M.K.Jain,S.R.K.Iyengar and R.K.Jain, Numerical
methods for Scientific and Computation, New Age
International (P) limited, Fifth Edition ,2007.
[11] Weijing Zhao and Hongxing,โ€Midpoint
Derivative-Based Closed Newton- Cotes Quadratureโ€,
Abstract and Applied Analysis, vol.2013, Article
ID 492507,10 pages,2013

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Open newton cotes quadrature with midpoint derivative for integration of algebraic functions

  • 1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 430 OPEN NEWTON - COTES QUADRATURE WITH MIDPOINT DERIVATIVE FOR INTEGRATION OF ALGEBRAIC FUNCTIONS T. Ramachandran1 , R.Parimala2 1 Assistant Professor, Department of Mathematics, M.V.Muthiah Government Arts College for Women, Tamil Nadu, India 2 Research Scholar, PG &Research Department of Mathematics, Government Arts College (Autonomous), Tamil Nadu, India Abstract Many methods are available for approximating the integral to the desired precision in Numerical integration. A new set of numerical integration formula of Open Newton-Cotes Quadrature with Midpoint Derivative type is suggested, which is the modified form of Open Newton-Cotes Quadrature. This new midpoint derivative based formula increase the two order of precision than the classical Open Newton-Cotes formula and also gives more accuracy than the existing formula. Further the error terms are obtained and compared with the existing methods. Finally, the effectiveness of the proposed algorithm is illustrated by means of a numerical example. Key Words: Numerical Integration, Open Newton-Cotes formula, Midpoint Derivative, Numerical Examples. ----------------------------------------------------------------------------***---------------------------------------------------------------------------- 1.INTRODUCTION Numerical integration is the process of computing the value of a definite integral from a set of numerical values of the integrand. The process of evaluation of integration of a function of a single variable is sometimes called Mechanical Quadrature. The computation of a double integral of a function of two independent variables is called Mechanical Cubature. There are many methods are available for numerical integration [1]. Consider the definite integral I f = f x dx b a 1 where the function f(x) is continuous in the closed interval [a,b], so that the integral I(f) exists. An efficient formula is developed for computing approximate value of the integral using only values of the integrand f(x) at points x โˆˆ [a,b]. To approximate the integral I(f),we integrate exactly piecewise polynomial approximations of f(x) on the interval [a,b]. Generally, a quadrature rule has the form, f x dx b a โ‰ˆ ๐‘ค๐‘– ๐‘“ ๐‘ฅ๐‘– (2) ๐‘› ๐‘–=0 Where there (n+1) distinct points x0 < x1 < โ€ฆ < xn and (n+1) weights w0 ,w1 , ... , wn within the interval [a,b]. The error of approximation is given as, En f = f x dx b a โˆ’ ๐‘ค๐‘– ๐‘“ ๐‘ฅ๐‘– (3) ๐‘› ๐‘–=0 1.1 Definition An integration method of the form ( 3) is said to be of order P, if it produces exact results (En[f] = 0) for all polynomials of degree less than or equal to P [10]. In Open Newton-cotes rule, the end points of the interval is excluded in the function evaluation,i.e, f x dx b a = ๐‘ค๐‘– ๐‘“ ๐‘ฅ๐‘– โ‰ˆ ๐‘“ ๐‘ฅ ๐‘‘๐‘ฅ ๐‘ฅ ๐‘›+1 ๐‘ฅโˆ’1 (4) ๐‘› ๐‘–=0 for given n+1 distinct points x0 < x1 < ... < xn and n+1 weights w0, w1, ..., wn over the interval (a , b) with xi = a + ( i + 1) h, i = 0,1,2,...,n and โ„Ž = ๐‘โˆ’๐‘Ž ๐‘›+2 [ 7 ] . Therefore, the Open Newton cotes rules are given as follows, If n = 0; f x dx b a = b โˆ’ a f a + b 2 + (๐‘ โˆ’ ๐‘Ž)3 24 ๐‘“"(๐œ‰), (5) where ๐œ‰ โˆˆ ๐‘Ž, ๐‘ . If n = 1; f x dx b a = b โˆ’ a 2 f 2a + b 3 + f a + 2b 3 + (๐‘ โˆ’ ๐‘Ž)3 36 ๐‘“"(๐œ‰), (6)
  • 2. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 431 where ๐œ‰ โˆˆ ๐‘Ž, ๐‘ . If n = 2; f x dx b a = b โˆ’ a 3 2f 3a + b 4 โˆ’ f a + b 2 + 2f a + 3b 4 + 14 45 b โˆ’ a 4 5 ๐‘“ 4 ๐œ‰ , (7) where ๐œ‰ โˆˆ ๐‘Ž, ๐‘ . If n = 3; f x dx b a = b โˆ’ a 24 11f 4a + b 5 + f 3a + 2b 5 + f 2a + 3b 5 + 11f a + 4b 5 + 95 144 b โˆ’ a 5 5 ๐‘“ 4 ๐œ‰ , (8) where ๐œ‰ โˆˆ ๐‘Ž, ๐‘ . In the closed Newton-cotes quadrature, the endpoints are included; whereas the open Newton- cotes quadrature, only the interior points are included. The corrected open Newton-cotes quadrature has higher precision than the classical quadrature rule. There are so many works has been done on the numerical improvement of Newton- cotes formulas. Dehghan et al., presented an improvement of open, semi-open ,closed ,first and second kind [4 โ€“ 6, 8, 9] Chebyshev Newton- cotes quadrature rules. In the recent years, Clarence O.E Burg and his companions introduced a new family of derivative based rules [2, 3, 7]. In 2013, Weijing Zhao and Hongxing Li [11] introduced a new family of closed Newton-cotes quadrature with Midpoint derivative rules. In this paper, a new family of open Newton-cotes quadrature rule is described, which uses the derivative v a l u e at the Midpoint with their error terms. Also some numerical examples are given with their results and comparison. The result shows that the new formulas give better solution than the classical ones. 2 .OPEN NEWTON - COTES QUADRATURE WITH MIDPOINT DERIVATIVE A new Open Newton - Cotes Quadrature rules with Midpoint โ€“ Derivative is explained below which g i v e s higher precision than the classical Newton-Cotes Quadrature rules. 2.1 Theorem Open Newton - Cotes Quadrature with Midpoint - Derivative for (n=0) is f x dx b a โ‰ˆ b โˆ’ a f a + b 2 + (๐‘ โˆ’ ๐‘Ž)3 24 ๐‘“" ๐‘Ž + ๐‘ 2 (9) The precision of this method is 3. Proof: Since the rule (9) has the degree of precision 1. Now we verify that the rule (9) is exact for f(x) = x2, x3. When ๐‘“ ๐‘ฅ = ๐‘ฅ2 , ๐‘ฅ2 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 3 ๐‘3 โˆ’ ๐‘Ž3 ; ๐‘› = 0 โŸน ๐‘ โˆ’ ๐‘Ž ๐‘Ž + ๐‘ 2 2 + 2 ๐‘ โˆ’ ๐‘Ž 3 24 = 1 3 ๐‘3 โˆ’ ๐‘Ž3 . When ๐‘“ ๐‘ฅ = ๐‘ฅ3 , ๐‘ฅ3 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 4 ๐‘4 โˆ’ ๐‘Ž4 ; ๐‘› = 0 โŸน ๐‘ โˆ’ ๐‘Ž ๐‘Ž + ๐‘ 2 3 + 6 ๐‘ โˆ’ ๐‘Ž 3 24 ๐‘Ž + ๐‘ 2 = 1 4 ๐‘4 โˆ’ ๐‘Ž4 . Therefore, the precision of Open Newton - Cotes Quadrature with Midpoint - Derivative is 3. 2.2 Theorem Open Newton - Cotes Quadrature with Midpoint - Derivative for (n=1) is f x dx b a โ‰ˆ b โˆ’ a 2 f 2a + b 3 + f a + 2b 3 + (๐‘ โˆ’ ๐‘Ž)3 36 ๐‘“" ๐‘Ž + ๐‘ 2 , (10) The precision of this method is 3. Proof: Since the rule (10) has the degree of precision 1.Now we verify that the rule (10) is exact for f(x) = x2, x3. When ๐‘“ ๐‘ฅ = ๐‘ฅ2 , ๐‘ฅ2 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 3 ๐‘3 โˆ’ ๐‘Ž3 ; ๐‘› = 1 โŸน ๐‘ โˆ’ ๐‘Ž 2 2๐‘Ž + ๐‘ 3 2 + ๐‘Ž + 2๐‘ 3 2 + 2(๐‘ โˆ’ ๐‘Ž)3 36 = 1 3 ๐‘3 โˆ’ ๐‘Ž3 .
  • 3. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 432 When ๐‘“ ๐‘ฅ = ๐‘ฅ3 , ๐‘ฅ3 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 4 ๐‘4 โˆ’ ๐‘Ž4 ; ๐‘› = 1 โŸน ๐‘ โˆ’ ๐‘Ž 2 2๐‘Ž + ๐‘ 3 3 + ๐‘Ž + 2๐‘ 3 3 + 6(๐‘ โˆ’ ๐‘Ž)3 36 ๐‘Ž + ๐‘ 2 = 1 4 ๐‘4 โˆ’ ๐‘Ž4 . Therefore, the precision of Open Newton - Cotes Quadrature with Midpoint - Derivative is 3. 2.3 Theorem Open Newton - Cotes Quadrature with Midpoint - Derivative for (n=2) is f x dx b a โ‰ˆ b โˆ’ a 3 2f 3a + b 4 โˆ’ f a + b 2 + 2f a + 3b 4 + 14 45 b โˆ’ a 4 5 ๐‘“ 4 ๐‘Ž + ๐‘ 2 , (11) The precision of this method is 5 . Proof: Since the rule (11) has the degree of precision 3.Now we verify that the rule (11) is exact for f(x) = x4, x5. When ๐‘“ ๐‘ฅ = ๐‘ฅ4 , ๐‘ฅ4 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 5 ๐‘5 โˆ’ ๐‘Ž5 ; ๐‘› = 2 โŸน ๐‘ โˆ’ ๐‘Ž 3 2 3๐‘Ž + ๐‘ 4 4 โˆ’ ๐‘Ž + ๐‘ 2 4 + 2 ๐‘Ž + 3๐‘ 4 4 + 336 45 b โˆ’ a 4 5 = 1 5 ๐‘5 โˆ’ ๐‘Ž5 . When ๐‘“ ๐‘ฅ = ๐‘ฅ5 , ๐‘ฅ5 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 6 ๐‘6 โˆ’ ๐‘Ž6 ; ๐‘› = 2 โŸน ๐‘ โˆ’ ๐‘Ž 3 2 3๐‘Ž + ๐‘ 4 5 โˆ’ ๐‘Ž + ๐‘ 2 5 + 2 ๐‘Ž + 3๐‘ 4 5 + 1680 45 b โˆ’ a 4 5 ๐‘Ž + ๐‘ 2 = 1 6 ๐‘6 โˆ’ ๐‘Ž6 . Therefore, the precision of Open Newton - Cotes Quadrature with Midpoint - Derivative is 5. 2.4 Theorem Open Newton - Cotes Quadrature with Midpoint - Derivative for (n=3) i s f x dx b a โ‰ˆ b โˆ’ a 24 11f 4a + b 5 + f 3a + 2b 5 + f 2a + 3b 5 + 11f a + 4b 5 + 95 144 b โˆ’ a 4 5 ๐‘“ 4 ๐‘Ž + ๐‘ 2 , (12) The precision of this method is 5 . Proof: Since the rule (12) has the degree of precision 3.Now we verify that the rule (12) is exact for f(x) = x4, x5. When ๐‘“ ๐‘ฅ = ๐‘ฅ4 , ๐‘ฅ4 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 5 ๐‘5 โˆ’ ๐‘Ž5 ; ๐‘› = 3 โŸน ๐‘ โˆ’ ๐‘Ž 24 11 4๐‘Ž + ๐‘ 5 4 + 3๐‘Ž + 2๐‘ 5 4 + 2๐‘Ž + 3๐‘ 5 4 + 11 ๐‘Ž + 4๐‘ 5 4 + 2280 144 b โˆ’ a 5 5 = 1 5 ๐‘5 โˆ’ ๐‘Ž5 . When ๐‘“ ๐‘ฅ = ๐‘ฅ5 , ๐‘ฅ5 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 6 ๐‘6 โˆ’ ๐‘Ž6 ; ๐‘› = 3 โŸน ๐‘ โˆ’ ๐‘Ž 24 11 4๐‘Ž + ๐‘ 5 5 + 3๐‘Ž + 2๐‘ 5 5 + 2๐‘Ž + 3๐‘ 5 5 + 11 ๐‘Ž + 4๐‘ 5 5 + 11400 144 b โˆ’ a 5 5 ๐‘Ž + ๐‘ 2 = 1 6 ๐‘6 โˆ’ ๐‘Ž6 . Therefore, the precision of Open Newton - Cotes Quadrature with Midpoint - Derivative is 5. 3. THE ERROR TERMS OF OPEN NEWTON-COTES QUADRATURE WITH MIDPOINT DERIVATIVE The Error terms of Open Newton-Cotes Quadrature with Midpoint derivative are given below. The Error terms are the difference between the exact value and the quadrature rule. 3.1 Theorem The Error term of Open Newton - Cotes Quadrature with Midpoint - Derivative for (n=0) is f x dx b a = b โˆ’ a f a + b 2 + (๐‘ โˆ’ ๐‘Ž)3 24 ๐‘“" ๐‘Ž + ๐‘ 2 + (๐‘ โˆ’ ๐‘Ž)5 1920 ๐‘“(4) (๐œ‰), (13)
  • 4. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 433 where ฮพ โˆˆ (a, b).This is fifth order accurate with the error term is ๐ธ1 ๐‘“ = ๐‘ โˆ’ ๐‘Ž 5 1920 ๐‘“ 4 ๐œ‰ . Proof: Let ๐‘“ ๐‘ฅ = ๐‘ฅ4 4! , 1 4! ๐‘ฅ4 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 120 ๐‘5 โˆ’ ๐‘Ž5 ; b โˆ’ a f a + b 2 + ๐‘ โˆ’ ๐‘Ž 3 24 ๐‘“" ๐‘Ž + ๐‘ 2 = ๐‘ โˆ’ ๐‘Ž 4! .16 3๐‘Ž4 + 4๐‘Ž3 ๐‘ + 2๐‘Ž2 ๐‘2 + 4๐‘Ž๐‘3 + 3๐‘4 , Therefore, 1 120 ๐‘5 โˆ’ ๐‘Ž5 โˆ’ ๐‘ โˆ’ ๐‘Ž 4! .16 3๐‘Ž4 + 4๐‘Ž3 ๐‘ + 2๐‘Ž2 ๐‘2 + 4๐‘Ž๐‘3 +3๐‘4 = (๐‘ โˆ’ ๐‘Ž)5 1920 . Therefore the Error term is, ๐ธ1 ๐‘“ = ๐‘ โˆ’ ๐‘Ž 5 1920 ๐‘“ 4 ๐œ‰ . 3.2 Theorem The Error term of Open Newton - Cotes Quadrature with Midpoint - Derivative for (n=1) is f x dx b a = b โˆ’ a 2 f 2a + b 3 + f a + 2b 3 + (๐‘ โˆ’ ๐‘Ž)3 36 ๐‘“" ๐‘Ž + ๐‘ 2 + 19(๐‘ โˆ’ ๐‘Ž)5 38880 ๐‘“(4) (๐œ‰), ( 14) where ฮพ โˆˆ (a, b).This is fifth order accurate with the error term is ๐ธ2 ๐‘“ = 19 ๐‘ โˆ’ ๐‘Ž 5 38880 ๐‘“ 4 ๐œ‰ . Proof: Let ๐‘“ ๐‘ฅ = ๐‘ฅ4 4! , 1 4! ๐‘ฅ4 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 120 ๐‘5 โˆ’ ๐‘Ž5 ; b โˆ’ a 2 f 2a + b 3 + f a + 2b 3 + ๐‘ โˆ’ ๐‘Ž 3 36 ๐‘“" ๐‘Ž + ๐‘ 2 = ๐‘ โˆ’ ๐‘Ž 7776 61๐‘Ž4 + 80๐‘Ž3 ๐‘ + 42๐‘Ž2 ๐‘2 + 80๐‘Ž๐‘3 + 61๐‘4 . Therefore, 1 120 ๐‘5 โˆ’ ๐‘Ž5 โˆ’ ๐‘ โˆ’ ๐‘Ž 7776 61๐‘Ž4 + 80๐‘Ž3 ๐‘ + 42๐‘Ž2 ๐‘2 +80๐‘Ž๐‘3 + 61๐‘4 = 19(๐‘ โˆ’ ๐‘Ž)5 38880 . Therefore the Error term is, ๐ธ2 ๐‘“ = 19 ๐‘ โˆ’ ๐‘Ž 5 38880 ๐‘“ 4 ๐œ‰ . 3.3 Theorem The Error term of Open Newton - Cotes Quadrature with Midpoint - Derivative for (n=2) is f x dx b a = b โˆ’ a 3 2f 3a + b 4 โˆ’ f a + b 2 + 2f a + 3b 4 + 14 45 b โˆ’ a 4 5 ๐‘“ 4 ๐‘Ž + ๐‘ 2 + 41(๐‘ โˆ’ ๐‘Ž)7 15482880 ๐‘“(6) (๐œ‰), (15) where ฮพ โˆˆ (a, b).This is seventh order accurate with the error term is ๐ธ3 ๐‘“ = 41(๐‘ โˆ’ ๐‘Ž)7 15482880 ๐‘“(6) (๐œ‰). Proof: Let ๐‘“ ๐‘ฅ = ๐‘ฅ6 6! , 1 6! ๐‘ฅ6 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 5040 ๐‘7 โˆ’ ๐‘Ž7 ; b โˆ’ a 3 2f 3a + b 4 โˆ’ f a + b 2 + 2f a + 3b 4 + 14 45 b โˆ’ a 4 5 ๐‘“ 4 ๐‘Ž + ๐‘ 2 = ๐‘ โˆ’ ๐‘Ž 3072.6! 4336๐‘Ž6 + 474๐‘Ž5 ๐‘ + 351๐‘Ž4 ๐‘2 + 556๐‘Ž3 ๐‘3 +351๐‘Ž2 ๐‘4 + 474๐‘Ž๐‘5 + 433๐‘6 . Therefore, (๐‘7 โˆ’ ๐‘Ž7 ) 5040 โˆ’ ๐‘ โˆ’ ๐‘Ž 3072.6! 4336๐‘Ž6 + 474๐‘Ž5 ๐‘ + 351๐‘Ž4 ๐‘2 + 556๐‘Ž3 ๐‘3 +351๐‘Ž2 ๐‘4 + 474๐‘Ž๐‘5 + 433๐‘6 = 41(๐‘ โˆ’ ๐‘Ž)7 15482880 Therefore the Error term is, ๐ธ3 ๐‘“ = 41(๐‘ โˆ’ ๐‘Ž)7 15482880 ๐‘“(6) (๐œ‰).
  • 5. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 434 3.4 Theorem The Error term of Open Newton - Cotes Quadrature with Midpoint - Derivative for (n=3) is f x dx b a = b โˆ’ a 24 11f 4a + b 5 + f 3a + 2b 5 + f 2a + 3b 5 + 11f a + 4b 5 + 95 144 b โˆ’ a 5 5 ๐‘“ 4 ๐‘Ž + ๐‘ 2 + 821(๐‘ โˆ’ ๐‘Ž)7 168. 55. 6! ๐‘“(6) (๐œ‰), , (16) where ฮพ โˆˆ (a, b).This is seventh order accurate with the error term is ๐ธ4 ๐‘“ = 821(๐‘ โˆ’ ๐‘Ž)7 168. 55. 6! ๐‘“(6) (๐œ‰). Proof: Let ๐‘“ ๐‘ฅ = ๐‘ฅ6 6! , 1 6! ๐‘ฅ6 ๐‘ ๐‘Ž ๐‘‘๐‘ฅ = 1 5040 ๐‘7 โˆ’ ๐‘Ž7 ; b โˆ’ a 24 11f 4a + b 5 + f 3a + 2b 5 + f 2a + 3b 5 + 11f a + 4b 5 + 95 144 b โˆ’ a 5 5 ๐‘“ 4 ๐‘Ž + ๐‘ 2 = ๐‘ โˆ’ ๐‘Ž 375000.6! 52985๐‘Ž6 + 57090๐‘Ž5 ๐‘ + 44775๐‘Ž4 ๐‘2 + 65300๐‘Ž3 ๐‘3 +44775๐‘Ž2 ๐‘4 + 57090๐‘Ž๐‘5 + 52985๐‘6 . Therefore, (๐‘7 โˆ’ ๐‘Ž7 ) 5040 โˆ’ ๐‘ โˆ’ ๐‘Ž 375000.6! 52985๐‘Ž6 + 57090๐‘Ž5 ๐‘ + 44775๐‘Ž4 ๐‘2 + 65300๐‘Ž3 ๐‘3 +44775๐‘Ž2 ๐‘4 + 57090๐‘Ž๐‘5 + 52985๐‘6 = 821(๐‘ โˆ’ ๐‘Ž)7 168. 55. 6! Therefore the Error term is, ๐ธ4 ๐‘“ = 821(๐‘ โˆ’ ๐‘Ž)7 168. 55. 6! ๐‘“(6) (๐œ‰). 4 . NUMERICAL RESULTS An approximate value of the following examples using the open Newton- cotes quadrature with Midpoint Derivative rules are determined and presented. To demonstrate the accuracy of the results, we evaluate the examples 1 โ€“ 4 and the Comparison of results is shown in Tables 1 โ€“ 4.. ๐“๐š๐›๐ฅ๐ž โˆ’ ๐Ÿ: ๐„๐ฑ๐š๐œ๐ญ ๐ฏ๐š๐ฅ๐ฎ๐ž ๐จ๐Ÿ ๐’† ๐’™ ๐๐ฑ = ๐Ÿ”. ๐Ÿ‘๐Ÿ–๐Ÿ—๐ŸŽ๐Ÿ“๐Ÿ”๐ŸŽ๐Ÿ—๐Ÿ–๐Ÿ— ๐Ÿ ๐ŸŽ n value ONC MDONC App. value Error App. value Error n=0 5.436563657 0.952492441 6.342657600 0.046398498 n=1 5.741401936 0.647654162 6.345464564 0.043515340 n=2 6.361692569 0.027363529 6.388120309 0.000935789 n=3 6.369923849 0.019132249 6.388287352 0.000768746 ๐“๐š๐›๐ฅ๐ž โˆ’ ๐Ÿ: ๐„๐ฑ๐š๐œ๐ญ ๐ฏ๐š๐ฅ๐ฎ๐ž ๐จ๐Ÿ ๐๐ฑ ๐Ÿ + ๐ฑ = ๐ŸŽ. ๐Ÿ”๐Ÿ—๐Ÿ‘๐Ÿ๐Ÿ’๐Ÿ•๐Ÿ๐Ÿ– ๐Ÿ ๐ŸŽ n value ONC MDONC App. value Error App. value Error n=0 0.666666666 0.026480520 0.691358018 0.001789162 n=1 0.675000000 0.018147180 0.691460905 0.001686275 n=2 0.692063492 0.001083688 0.693023711 0.000123469 n=3 0.692377645 0.000769535 0.693044860 0.000102320 ๐“๐š๐›๐ฅ๐ž โˆ’ ๐Ÿ‘: ๐„๐ฑ๐š๐œ๐ญ ๐ฏ๐š๐ฅ๐ฎ๐ž ๐จ๐Ÿ ๐Ÿ + ๐ฑ ๐Ÿ’ ๐๐ฑ = ๐Ÿ. ๐Ÿ ๐Ÿ ๐ŸŽ n value ONC MDONC App. value Error App. value Error n=0 1.06250000 0.13750000 1.187500000 0.012500000 n=1 1.104938272 0.095061728 1.188271605 0.011728395 n=2 1.192708333 0.007291666 1.200000000 0.000000000 n=3 1.194933333 0.005066666 1.200000000 0.000000000 ๐“๐š๐›๐ฅ๐ž โˆ’ ๐Ÿ’: ๐„๐ฑ๐š๐œ๐ญ ๐ฏ๐š๐ฅ๐ฎ๐ž ๐จ๐Ÿ ๐ž ๐ฑ ๐๐ฑ = ๐Ÿ”. ๐Ÿ‘๐Ÿ”๐Ÿ๐Ÿ–๐Ÿ’๐Ÿ“๐Ÿ”๐Ÿ’๐Ÿ ๐Ÿ ๐ŸŽ n value ONC MDONC App. value Error App. value Error n=0 4.14816890 1.88015657 6.162322472 0.199523169 n=1 5.05366896 1.30817667 6.174091231 0.187754410 n=2 6.24259421 0.11925142 6.352885779 0.008959862 n=3 6.27783380 0.08401183 6.354470691 0.007374950 From the results presented in Tables 1 - 4, it is observed that the Open Newton-Cotes quadrature with midpoint derivative g i v e s more accuracy than the classical ones.
  • 6. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org 435 5. CONCLUSION In this work we applied the Open Newton-Cotes Q u a d r a t u r e with Midpoint derivative over a finite interval [a,b]. The Error terms gives two orders of precision than the S t a n d a r d m e t h o d s .A numerical example is given to clarify the proposed Algorithm. 6. REFERENCES [1] K.E.Atkinson, An Introduction to Numerical Analysis, John wiley and Sons , New York , NY , USA , Second Edition, 1989. [2] Clarence O.E.Burg,โ€Derivative-based closed Newton- cotes numerical quadratureโ€, Applied Mathematics and Computations, vol.218, pp. 7052-7065, 2012. [3] Clarence O.E.Burg, and Ezechiel Degny, โ€Derivative- based midpoint quadrature rule, Applied Mathematics and Computations, vol.4, pp. 228-234 , 2013. [4] M.Dehghan, M.Masjed-Jamei, and M.R.Eslahchi, โ€On numerical improvementof closed Newton-Cotes quadrature rulesโ€, Applied Mathematics and Computations, vol.165, pp. 251-260 , 2005. [5] M.Dehghan, M.Masjed-Jamei, and M.R.Eslahchi, โ€The semi-open Newton-Cotes quadrature rule and its numerical improvementโ€, Applied Mathematics and Computations, vol.171, pp. 1129-1140 , 2005. [6] M.Dehghan, M.Masjed-Jamei, and M.R.Eslahchi, โ€On numerical improvement of open Newton-Cotes quadrature rulesโ€, Applied Mathematics and Computations, vol.175, pp. 618-627 , 2006. [7] Fiza Zafar,Saira Saleem and Clarence O.E.Burg, โ€New Derivaive based open Newton- cotes quadrature rules โ€,Abstract and Applied Analysis,Volume 2014 , Article ID 109138, 16 pages,2014. [8] S.M.Hashemiparast, M.R.Eslahchi,M.Dehghan, M.Masjed-Jamei,โ€On numerical improvement of the first kind Chebyshev-Newton-Cotes quadrature rulesโ€, Applied Mathematics and Computations, vol.174, pp. 1020-1032 , 2006. [9]S.M.Hashemiparast,M.Masjed-Jamei, M.R.Eslahchi,M.Dehghan,โ€On numerical improvement of the second kind Chebyshev-Newton-Cotes quadrature rules(open type)โ€, Applied Mathematics and Computations,vol.180, pp. 605-613 , 2006. [10]M.K.Jain,S.R.K.Iyengar and R.K.Jain, Numerical methods for Scientific and Computation, New Age International (P) limited, Fifth Edition ,2007. [11] Weijing Zhao and Hongxing,โ€Midpoint Derivative-Based Closed Newton- Cotes Quadratureโ€, Abstract and Applied Analysis, vol.2013, Article ID 492507,10 pages,2013