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BAB I
9. โˆซ
๐‘ฅ+1
๐‘ฅ2 โˆ’4๐‘ฅ+8
=
1
2
โˆซ
2(๐‘ฅ+1)
๐‘ฅ2โˆ’4๐‘ฅ+8
๐‘‘๐‘ฅ =
1
2
โˆซ
2๐‘ฅ+2
๐‘ฅ2โˆ’4๐‘ฅ+8
๐‘‘๐‘ฅ =
1
2
โˆซ
(2๐‘ฅโˆ’4)+6
๐‘ฅ2 โˆ’4๐‘ฅ+8
๐‘‘๐‘ฅ
=
1
2
โˆซ
2๐‘‹โˆ’4
๐‘ฅ2โˆ’4๐‘‹+8
๐‘‘๐‘ฅ +
1
2
โˆซ
6
๐‘ฅ2 โˆ’4๐‘ฅ+8
๐‘‘๐‘ฅ
=
1
2
ln (๐‘ฅ2
โˆ’ 4๐‘ฅ + 8) +
1
2
. 6โˆซ
๐‘‘๐‘ฅ
๐‘ฅ2โˆ’4๐‘ฅ+8
=
1
2
ln (๐‘ฅ2
โˆ’ 4๐‘ฅ + 8) +3โˆซ
๐‘‘๐‘ฅ
(๐‘ฅโˆ’2)2+(โˆš4)
2
=
1
2
ln (๐‘ฅ2
โˆ’ 4๐‘ฅ + 8) + 3.
1
2
๐‘Ž๐‘Ÿ๐‘ tan
๐‘ฅโˆ’2
2
+ ๐‘
13. โˆซ
(5โˆ’4๐‘ฅ) ๐‘‘๐‘ฅ
โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8
=
1
2
โˆซ
2(5โˆ’4๐‘ฅ) ๐‘‘๐‘ฅ
โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8
๐‘‘๐‘ฅ =
1
2
โˆซ
10โˆ’8๐‘ฅ
โˆš12๐‘ฅโˆ’4๐‘ฅ2 โˆ’8
๐‘‘๐‘ฅ
=
1
2
โˆซ
โˆ’2๐‘ฅ+(12โˆ’8๐‘ฅ)
โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8
๐‘‘๐‘ฅ
=
1
2
โˆซ
โˆ’2
โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8
๐‘‘๐‘ฅ +
1
2
โˆซ
12โˆ’8๐‘ฅ
โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8
๐‘‘๐‘ฅ
=
1
2
โˆซ
โˆ’2๐‘‘๐‘ฅ
โˆš(1)2โˆ’(2๐‘ฅโˆ’3)2
+ โˆš12๐‘ฅ โˆ’ 4๐‘ฅ2 โˆ’ 8 + ๐‘
=
1
2
. โˆ’1 โˆซ
2๐‘‘๐‘ฅ
โˆš(1)2โˆ’(2๐‘ฅโˆ’3)2
+ โˆš12๐‘ฅ โˆ’ 4๐‘ฅ2 โˆ’ 8 + ๐‘
= โˆ’
1
2
๐‘Ž๐‘Ÿ๐‘ sin
2๐‘ฅโˆ’3
1
+ โˆš12๐‘ฅ โˆ’ 4๐‘ฅ2 โˆ’ 8 + ๐‘
15. โˆซ
( ๐‘ฅโˆ’1) ๐‘‘๐‘ฅ
3๐‘ฅ2โˆ’4๐‘ฅ+3
=
1
6
โˆซ
6( ๐‘ฅโˆ’1) ๐‘‘๐‘ฅ
3๐‘ฅ2โˆ’4๐‘ฅ+3
=
1
6
โˆซ
6๐‘ฅโˆ’6
3๐‘ฅ2 โˆ’4๐‘ฅ+3
๐‘‘๐‘ฅ =
1
6
โˆซ
(6๐‘ฅโˆ’4)โˆ’2
3๐‘ฅ2โˆ’4๐‘ฅ+3
๐‘‘๐‘ฅ
=
1
6
โˆซ
6๐‘ฅโˆ’4
3๐‘ฅ2โˆ’4๐‘ฅ+3
๐‘‘๐‘ฅ +
1
6
โˆซ
โˆ’2
3๐‘ฅ2โˆ’4๐‘ฅ+3
๐‘‘๐‘ฅ =
1
6
ln(3๐‘ฅ2
โˆ’ 4๐‘ฅ +
3)+
1
6
. โˆ’2โˆซ
๐‘‘๐‘ฅ
3๐‘ฅ2โˆ’4๐‘ฅ+3
=
1
6
ln(3๐‘ฅ2
โˆ’ 4๐‘ฅ + 3) โˆ’
1
3
โˆซ
๐‘‘๐‘ฅ
(โˆš5)
2
โˆ’(3๐‘ฅโˆ’2)2
=
1
6
ln(3๐‘ฅ2
โˆ’ 4๐‘ฅ + 3) โˆ’
1
3
.
1
โˆš5
๐‘Ž๐‘Ÿ๐‘ tan
3๐‘ฅโˆ’2
โˆš5
+ ๐‘
BAB II
7. โˆซ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ ๐‘‘๐‘ฅ = ๐‘ฅ ๐‘Ž๐‘Ÿ๐‘tan ๐‘ฅ โˆ’ ln โˆš1 + ๐‘ฅ2 + ๐‘
โˆซ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ ๐‘‘๐‘ฅ = uvโˆ’โˆซ ๐‘ฃ๐‘‘๐‘ข
U= arc tan x dv = dx du =
1
1+๐‘ฅ2 ๐‘‘๐‘ฅ v = x
โˆซ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ ๐‘‘๐‘ฅ = ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ. ๐‘ฅ โˆ’ โˆซ ๐‘ฅ.
1
1+๐‘ฅ2 ๐‘‘๐‘ฅ
= ๐‘ฅ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ โˆ’
1
2
โˆซ
2๐‘ฅ
1+๐‘ฅ2 ๐‘‘๐‘ฅ
= ๐‘ฅ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ โˆ’
1
2
ln|1 + ๐‘ฅ2| + ๐‘
= ๐‘ฅ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ โˆ’ ๐‘™๐‘› โˆš1 + ๐‘ฅ2 + ๐‘
9.โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข๐‘‘๐‘ข =
๐‘๐‘œ๐‘  ๐‘šโˆ’1
๐‘ข ๐‘ ๐‘–๐‘›๐‘ข
๐‘š
+
๐‘šโˆ’1
๐‘š
โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2
๐‘ข๐‘‘๐‘ข
โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข๐‘‘๐‘ข = โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’1+1
๐‘ข๐‘‘๐‘ข = โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’1
๐‘ข ๐‘๐‘œ๐‘ ๐‘ข๐‘‘๐‘ข
๐‘ฆ = ๐‘๐‘œ๐‘  ๐‘šโˆ’1
๐‘ข
๐‘‘๐‘ฆ = ๐‘š โˆ’ 1๐‘๐‘œ๐‘  ๐‘šโˆ’2
๐‘ข โˆ’ sin ๐‘ข = โˆ’( ๐‘š โˆ’ 1). ๐‘๐‘œ๐‘  ๐‘šโˆ’2
sin ๐‘ข ๐‘‘๐‘ข
dx= cos u du
x= sin u
โ†’ โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1
๐‘ข sin ๐‘ข โˆ’ โˆซ sin ๐‘ข. โˆ’๐‘š โˆ’ 1. ๐‘๐‘œ๐‘  ๐‘šโˆ’1
= ๐‘๐‘œ๐‘  ๐‘šโˆ’1
sin ๐‘ข + ๐‘š โˆ’ 1โˆซ ๐‘ ๐‘–๐‘›2
๐‘ข. ๐‘๐‘œ๐‘  ๐‘šโˆ’2
๐‘‘๐‘ข
= ๐‘๐‘œ๐‘  ๐‘šโˆ’1
sin ๐‘ข + ๐‘š โˆ’ 1 โˆซ(1 โˆ’ ๐‘๐‘œ๐‘ 2
๐‘ข). ๐‘๐‘œ๐‘  ๐‘šโˆ’2
๐‘ข ๐‘‘๐‘ข
= ๐‘๐‘œ๐‘  ๐‘šโˆ’1
sin ๐‘ข + ๐‘š โˆ’ 1โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2
โˆ’ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข
= ๐‘๐‘œ๐‘  ๐‘šโˆ’1
sin ๐‘ข + ๐‘š โˆ’ 1โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2
โˆ’ (๐‘š โˆ’ 1)โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข
= ๐‘๐‘œ๐‘  ๐‘šโˆ’1
sin ๐‘ข + ๐‘š โˆ’ 1โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2
โˆ’ ๐‘š โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข + โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข
โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข + ๐‘š โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข โˆ’ โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1
sin ๐‘ข + ๐‘š โˆ’
1 โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2
๐‘‘๐‘ข
mโˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1
sin ๐‘ข + ๐‘š โˆ’ 1 โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2
๐‘‘๐‘ข
โˆซ ๐‘๐‘œ๐‘  ๐‘š
๐‘ข ๐‘‘๐‘ข =
๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข
๐‘š
+
๐‘šโˆ’1
๐‘š
โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2
๐‘ข ๐‘‘๐‘ข
REDUKSI
1. โˆซ
๐‘‘๐‘ฅ
(1โˆ’๐‘ฅ2)3 =
1
12 {
๐‘ฅ
(2.3โˆ’2)(12โˆ’๐‘ฅ2)3โˆ’1 +
2.3โˆ’3
2.3โˆ’2
โˆซ
๐‘‘๐‘ฅ
(1โˆ’๐‘ฅ2)3โˆ’2
=
๐‘ฅ
4(12โˆ’๐‘ฅ2)2 +
3
4
โˆซ
๐‘‘๐‘ฅ
(1โˆ’๐‘ฅ2 )2
=
๐‘ฅ
4(12โˆ’๐‘ฅ2)2 +
3
4
{
๐‘ฅ
(2.2โˆ’2)(1โˆ’๐‘ฅ2)
+
2.2โˆ’3
2.2โˆ’2
โˆซ
๐‘‘๐‘ฅ
(1โˆ’๐‘ฅ2)
=
๐‘ฅ
4(12โˆ’๐‘ฅ2)2 +
3
4
{
๐‘ฅ
2(1โˆ’๐‘ฅ2)
+
1
2
.
1
2
ln |
1+๐‘ฅ
1โˆ’๐‘ฅ
| + ๐‘
=
๐‘ฅ
4(12โˆ’๐‘ฅ2)2 +
3๐‘ฅ
8(1โˆ’๐‘ฅ2)
+
3
16
ln |
1+๐‘ฅ
1โˆ’๐‘ฅ
| + ๐‘
=
2๐‘ฅ
8(1โˆ’๐‘ฅ2)2 +
3๐‘ฅ(1โˆ’๐‘ฅ2
)
8(1โˆ’๐‘ฅ2)2 +
3
16
ln |
1+๐‘ฅ
1โˆ’๐‘ฅ
| = ๐‘
=
5๐‘ฅโˆ’3๐‘ฅ3
8(1โˆ’๐‘ฅ2)2 +
3
16
ln |
1+๐‘ฅ
1โˆ’๐‘ฅ
| + ๐‘
=
๐‘ฅ(5โˆ’3๐‘ฅ2
)
8(1โˆ’๐‘ฅ2)2 +
3
16
ln |
1+๐‘ฅ
1โˆ’๐‘ฅ
| + ๐‘
3. โˆซ ๐‘๐‘œ๐‘ 5
๐‘ฅ ๐‘‘๐‘ฅ =
1
5
(3๐‘๐‘œ๐‘ 4
๐‘ฅ + 4๐‘๐‘œ๐‘ 2
๐‘ฅ + 8) ๐‘ ๐‘–๐‘›๐‘ฅ + ๐‘
Rumus reduksi 7 โ†’ ๐‘๐‘œ๐‘  ๐‘š
๐‘ฅ ๐‘‘๐‘ฅ =
๐‘๐‘œ๐‘  ๐‘šโˆ’1
๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ
๐‘š
+
๐‘šโˆ’1
๐‘š
โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2
๐‘ฅ ๐‘‘๐‘ฅ
โˆซ ๐‘๐‘œ๐‘ 5
๐‘ฅ ๐‘‘๐‘ฅ =
๐‘๐‘œ๐‘ 5 โˆ’1
๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ
5
+
5โˆ’1
5
โˆซ ๐‘๐‘œ๐‘ 5โˆ’2
๐‘ฅ ๐‘‘๐‘ฅ
โˆซ ๐‘ฆ๐‘‘๐‘ฅ = ๐‘ฆ๐‘ฅ โˆ’ โˆซ ๐‘ฅ๐‘‘๐‘ฆ
=
๐‘๐‘œ๐‘ 5โˆ’1
๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ
5
+
4
5
โˆซ ๐‘๐‘œ๐‘ 3
๐‘ฅ ๐‘‘๐‘ฅ
=
๐‘๐‘œ๐‘ 4
๐‘ ๐‘–๐‘›๐‘ฅ
5
+
4
5
{
๐‘๐‘œ๐‘ 2
๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ
3
+
2
3
โˆซ ๐‘๐‘œ๐‘ ๐‘ฅ ๐‘‘๐‘ฅ}
=
๐‘๐‘œ๐‘ 4
๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ
5
+
4๐‘๐‘œ๐‘ 2
๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ
15
8
15
๐‘ ๐‘–๐‘›๐‘ฅ
=
1
15
{3๐‘๐‘œ๐‘ 4
๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ + 4๐‘๐‘œ๐‘ 2
๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ + 8๐‘ ๐‘–๐‘›๐‘ฅ} + ๐‘
=
1
15
{3๐‘๐‘œ๐‘ 4
๐‘ฅ + 4๐‘๐‘œ๐‘ 2
๐‘ฅ + 8} ๐‘ ๐‘–๐‘›๐‘ฅ + ๐‘
5. โˆซ ๐‘’2๐‘ฅ
(2sin 4๐‘ฅ โˆ’ 5 ๐‘๐‘œ๐‘  4๐‘ฅ)๐‘‘๐‘ฅ =
1
25
๐‘’2๐‘ฅ
(โˆ’14sin 4๐‘ฅ โˆ’ 23cos4๐‘ฅ) + ๐‘
๐‘’2๐‘ฅ
(๐ด cos4๐‘ฅ + ๐ต sin 4๐‘ฅ) โ†’ ๐‘š๐‘Ž๐‘˜๐‘Ž:
๐‘’3๐‘ฅ
(2sin 4๐‘ฅ โˆ’ 5cos 4๐‘ฅ) = ๐‘’3๐‘ฅ(3๐ด + 4๐ต) ๐ถ๐‘‚๐‘† 4๐‘‹ + ๐‘’3๐‘ฅ(3๐ต โˆ’
4๐ด)sin 4๐‘ฅ
Maka:
3A+4B=-5 x3 9A+12B=-15
-4A+3B=2 x4 -16A=12B=8 _
25A= -23
A= -23/25
3๐ต = 2 + 4๐ด = 2 โˆ’
92
25
=
โˆ’42
25
โ†” ๐ต =
โˆ’14
25
โ†” ๐ธ2๐‘‹
(2sin 4๐‘ฅ โˆ’ 5 cos4๐‘ฅ)๐‘‘๐‘ฅ
= ๐‘’2๐‘ฅ
(โˆ’
23
25
๐‘๐‘œ๐‘ 4๐‘ฅ โˆ’
14
25
sin 4๐‘ฅ) + ๐‘
= โˆ’
1
25
๐‘’2๐‘ฅ
(23cos4๐‘ฅ + 14sin 4๐‘ฅ) + ๐‘
=
1
25
๐‘’2๐‘ฅ
(โˆ’14sin 4๐‘ฅ โˆ’ 23 ๐‘๐‘œ๐‘  4๐‘ฅ)+ ๐‘
BAB III
10. โˆซ (
sec ๐‘ฅ
tan ๐‘ฅ
)
4
๐‘‘๐‘ฅ =
1
3 ๐‘ก๐‘Ž๐‘›3 ๐‘ฅ
โˆ’
1
tan ๐‘ฅ
+ ๐‘
= โˆซ (
1
๐‘๐‘œ๐‘ ๐‘ฅ
๐‘ ๐‘–๐‘›๐‘ฅ
๐‘๐‘œ๐‘ ๐‘ฅ
)
4
๐‘‘๐‘ฅ = โˆซ (
1
๐‘๐‘œ๐‘ ๐‘ฅ
.
๐‘๐‘œ๐‘ ๐‘ฅ
๐‘ ๐‘–๐‘›๐‘ฅ
)
4
๐‘‘๐‘ฅ = โˆซ (
1
๐‘ ๐‘–๐‘›๐‘ฅ
)
4
๐‘‘๐‘ฅ
= โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘4
๐‘ฅ๐‘‘๐‘ฅ = โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘2 (1 + ๐‘๐‘œ๐‘ก2
๐‘ฅ) ๐‘‘๐‘ฅ
= โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘2
๐‘‘๐‘ฅ + โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘2
๐‘ฅ๐‘๐‘œ๐‘ก2
๐‘ฅ ๐‘‘๐‘ฅ
= โˆ’๐‘๐‘œ๐‘ก๐‘ฅ + โˆซ ๐‘๐‘œ๐‘ก2
๐‘ฅ๐‘๐‘œ๐‘ ๐‘’๐‘2
๐‘ฅ ๐‘‘๐‘ฅ
= โˆ’๐‘๐‘œ๐‘ก๐‘ฅ + โˆซ ๐‘๐‘œ๐‘ก2
๐‘ฅ ๐‘‘(โˆ’๐‘๐‘œ๐‘ก๐‘ฅ)
= โˆ’๐‘๐‘œ๐‘ก๐‘ฅ + โˆ’
1
3
๐‘๐‘œ๐‘ก3
๐‘ฅ + ๐‘
= โˆ’
1
3๐‘ก๐‘Ž๐‘›3 ๐‘ฅ
โˆ’
1
๐‘ก๐‘Ž๐‘›๐‘ฅ
+ ๐‘
13.
15. โˆซ
๐‘๐‘œ๐‘ก3
๐‘ฅ ๐‘‘๐‘ฅ
๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ
= โˆซ
๐‘๐‘œ๐‘ก2
๐‘ฅ.๐‘๐‘œ๐‘ก๐‘ฅ ๐‘‘๐‘ฅ
๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ
= โˆซ
(๐‘๐‘œ๐‘ ๐‘’๐‘2
๐‘ฅโˆ’1).cot ๐‘ฅ ๐‘‘๐‘ฅ
๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ
= โˆซ
๐‘๐‘œ๐‘ ๐‘’๐‘2
๐‘ฅ.cot ๐‘ฅ
๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ
๐‘‘๐‘ฅ โˆ’ โˆซ
cot๐‘ฅ
๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ
๐‘‘๐‘ฅ
= โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ. cot ๐‘ฅ ๐‘‘๐‘ฅ โˆ’ โˆซ cos ๐‘‘๐‘ฅ
= -cosec x โ€“ sin x+c = -sin x- cosec x +c
BAB IV
9. โˆซ
โˆš25โˆ’๐‘ฅ2
๐‘‹
= 5ln |
5โˆ’โˆš25โˆ’๐‘ฅ2
๐‘ฅ
| + โˆš25โˆ’ ๐‘ฅ2 + ๐‘
a=5 b=1 u= x ๐‘ข =
๐‘Ž
๐‘
sin ๐‘ง ๐‘ฅ =
5 ๐‘ ๐‘–๐‘›๐‘ง
dx= 5 cos z sin ๐‘ง =
๐‘ฅ
5
โˆš25 โˆ’ ๐‘ฅ2 = ๐‘Ž cos ๐‘ง = 5cos ๐‘ง
โˆซ
โˆš25โˆ’๐‘ฅ2
๐‘‹
๐‘‘๐‘ฅ = โˆซ
(5 cos ๐‘ง)(5cos ๐‘ง)
5 sin ๐‘ง
= โˆซ
25 ๐‘๐‘œ๐‘  2
๐‘ง
5 sin ๐‘ง
๐‘‘๐‘ง
= 5 โˆซ
๐‘๐‘œ๐‘ 2
๐‘ง
sin ๐‘ง
๐‘‘๐‘ง = 5 โˆซ
(1โˆ’๐‘ ๐‘–๐‘›2
๐‘ง)
sin ๐‘ง
๐‘‘๐‘ง
= 5(โˆซ
1
๐‘ ๐‘–๐‘›๐‘ง
๐‘‘๐‘ง โˆ’ โˆซ sin ๐‘ง ๐‘‘๐‘ง
= 5 โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ง ๐‘‘๐‘ง โˆ’ 5 โˆซ sin ๐‘ง ๐‘‘๐‘ง
= 5| ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ง โˆ’ cot ๐‘ง| + 5 cos ๐‘ง + ๐‘
= 5|
5
๐‘ฅ
โˆ’
โˆš25โˆ’๐‘ฅ2
๐‘ฅ
|+ 5.
โˆš25โˆ’๐‘ฅ2
๐‘ฅ
+ ๐‘
= 5|
5โˆ’โˆš25โˆ’๐‘ฅ2
๐‘ฅ
| + โˆš25 โˆ’ ๐‘ฅ2 + ๐‘
13.
BAB V
12. โˆซ
๐‘ฅ2
+3๐‘ฅโˆ’4
๐‘ฅ2โˆ’2๐‘ฅโˆ’8
๐‘‘๐‘ฅ = ๐‘ฅ + ln|(๐‘ฅ + 2)(๐‘ฅ โˆ’ 4)4| + ๐‘
โ†’ ๐‘ฅ2
โˆ’ 2๐‘ฅ โˆ’ 8
1
โˆš๐‘ฅ2+3๐‘ฅโˆ’4
๐‘ฅ2โˆ’2๐‘ฅโˆ’8
5๐‘ฅ+4
โˆ’
โ†’ โˆซ 1 +
5๐‘ฅ+4
๐‘ฅ2โˆ’2๐‘ฅโˆ’8
๐‘‘๐‘ฅ
โ†’๐‘ฅ2
โˆ’ 2๐‘ฅ โˆ’ 8 = (๐‘ฅ + 2)(๐‘ฅ โˆ’ 4)
5๐‘ฅ+4
๐‘ฅ2 โˆ’2๐‘ฅโˆ’8
=
๐ด
๐‘ฅ+2
+
๐ต
๐‘ฅโˆ’4
dikali (x+2)(x-4)
5x+4 = A(x-4)+B(x+2) = (A+B)x-4A+2B
A=1,B=4
โ†’โˆซ 1 +
5๐‘ฅ+4
๐‘ฅ2 โˆ’2๐‘ฅโˆ’8
๐‘‘๐‘ฅ = โˆซ 1 ๐‘‘๐‘ฅ
+ โˆซ
๐ด ๐‘‘๐‘ฅ
(๐‘ฅ+2)
+ โˆซ
๐ต ๐‘‘๐‘ฅ
(๐‘ฅโˆ’4)
= ๐‘ฅ + โˆซ
๐‘‘๐‘ฅ
(๐‘ฅ+2)
+ 4โˆซ
๐‘‘๐‘ฅ
๐‘ฅโˆ’4
= ๐‘ฅ + ln( ๐‘ฅ + 2) + 4ln( ๐‘ฅ โˆ’ 4) + ๐‘
= ๐‘ฅ + ln|(๐‘ฅ + 2)(๐‘ฅ โˆ’ 4)4| + ๐‘

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  • 1. BAB I 9. โˆซ ๐‘ฅ+1 ๐‘ฅ2 โˆ’4๐‘ฅ+8 = 1 2 โˆซ 2(๐‘ฅ+1) ๐‘ฅ2โˆ’4๐‘ฅ+8 ๐‘‘๐‘ฅ = 1 2 โˆซ 2๐‘ฅ+2 ๐‘ฅ2โˆ’4๐‘ฅ+8 ๐‘‘๐‘ฅ = 1 2 โˆซ (2๐‘ฅโˆ’4)+6 ๐‘ฅ2 โˆ’4๐‘ฅ+8 ๐‘‘๐‘ฅ = 1 2 โˆซ 2๐‘‹โˆ’4 ๐‘ฅ2โˆ’4๐‘‹+8 ๐‘‘๐‘ฅ + 1 2 โˆซ 6 ๐‘ฅ2 โˆ’4๐‘ฅ+8 ๐‘‘๐‘ฅ = 1 2 ln (๐‘ฅ2 โˆ’ 4๐‘ฅ + 8) + 1 2 . 6โˆซ ๐‘‘๐‘ฅ ๐‘ฅ2โˆ’4๐‘ฅ+8 = 1 2 ln (๐‘ฅ2 โˆ’ 4๐‘ฅ + 8) +3โˆซ ๐‘‘๐‘ฅ (๐‘ฅโˆ’2)2+(โˆš4) 2 = 1 2 ln (๐‘ฅ2 โˆ’ 4๐‘ฅ + 8) + 3. 1 2 ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅโˆ’2 2 + ๐‘ 13. โˆซ (5โˆ’4๐‘ฅ) ๐‘‘๐‘ฅ โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8 = 1 2 โˆซ 2(5โˆ’4๐‘ฅ) ๐‘‘๐‘ฅ โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8 ๐‘‘๐‘ฅ = 1 2 โˆซ 10โˆ’8๐‘ฅ โˆš12๐‘ฅโˆ’4๐‘ฅ2 โˆ’8 ๐‘‘๐‘ฅ = 1 2 โˆซ โˆ’2๐‘ฅ+(12โˆ’8๐‘ฅ) โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8 ๐‘‘๐‘ฅ = 1 2 โˆซ โˆ’2 โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8 ๐‘‘๐‘ฅ + 1 2 โˆซ 12โˆ’8๐‘ฅ โˆš12๐‘ฅโˆ’4๐‘ฅ2โˆ’8 ๐‘‘๐‘ฅ = 1 2 โˆซ โˆ’2๐‘‘๐‘ฅ โˆš(1)2โˆ’(2๐‘ฅโˆ’3)2 + โˆš12๐‘ฅ โˆ’ 4๐‘ฅ2 โˆ’ 8 + ๐‘ = 1 2 . โˆ’1 โˆซ 2๐‘‘๐‘ฅ โˆš(1)2โˆ’(2๐‘ฅโˆ’3)2 + โˆš12๐‘ฅ โˆ’ 4๐‘ฅ2 โˆ’ 8 + ๐‘ = โˆ’ 1 2 ๐‘Ž๐‘Ÿ๐‘ sin 2๐‘ฅโˆ’3 1 + โˆš12๐‘ฅ โˆ’ 4๐‘ฅ2 โˆ’ 8 + ๐‘ 15. โˆซ ( ๐‘ฅโˆ’1) ๐‘‘๐‘ฅ 3๐‘ฅ2โˆ’4๐‘ฅ+3 = 1 6 โˆซ 6( ๐‘ฅโˆ’1) ๐‘‘๐‘ฅ 3๐‘ฅ2โˆ’4๐‘ฅ+3 = 1 6 โˆซ 6๐‘ฅโˆ’6 3๐‘ฅ2 โˆ’4๐‘ฅ+3 ๐‘‘๐‘ฅ = 1 6 โˆซ (6๐‘ฅโˆ’4)โˆ’2 3๐‘ฅ2โˆ’4๐‘ฅ+3 ๐‘‘๐‘ฅ = 1 6 โˆซ 6๐‘ฅโˆ’4 3๐‘ฅ2โˆ’4๐‘ฅ+3 ๐‘‘๐‘ฅ + 1 6 โˆซ โˆ’2 3๐‘ฅ2โˆ’4๐‘ฅ+3 ๐‘‘๐‘ฅ = 1 6 ln(3๐‘ฅ2 โˆ’ 4๐‘ฅ + 3)+ 1 6 . โˆ’2โˆซ ๐‘‘๐‘ฅ 3๐‘ฅ2โˆ’4๐‘ฅ+3 = 1 6 ln(3๐‘ฅ2 โˆ’ 4๐‘ฅ + 3) โˆ’ 1 3 โˆซ ๐‘‘๐‘ฅ (โˆš5) 2 โˆ’(3๐‘ฅโˆ’2)2 = 1 6 ln(3๐‘ฅ2 โˆ’ 4๐‘ฅ + 3) โˆ’ 1 3 . 1 โˆš5 ๐‘Ž๐‘Ÿ๐‘ tan 3๐‘ฅโˆ’2 โˆš5 + ๐‘ BAB II 7. โˆซ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ ๐‘‘๐‘ฅ = ๐‘ฅ ๐‘Ž๐‘Ÿ๐‘tan ๐‘ฅ โˆ’ ln โˆš1 + ๐‘ฅ2 + ๐‘ โˆซ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ ๐‘‘๐‘ฅ = uvโˆ’โˆซ ๐‘ฃ๐‘‘๐‘ข U= arc tan x dv = dx du = 1 1+๐‘ฅ2 ๐‘‘๐‘ฅ v = x โˆซ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ ๐‘‘๐‘ฅ = ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ. ๐‘ฅ โˆ’ โˆซ ๐‘ฅ. 1 1+๐‘ฅ2 ๐‘‘๐‘ฅ = ๐‘ฅ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ โˆ’ 1 2 โˆซ 2๐‘ฅ 1+๐‘ฅ2 ๐‘‘๐‘ฅ = ๐‘ฅ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ โˆ’ 1 2 ln|1 + ๐‘ฅ2| + ๐‘ = ๐‘ฅ ๐‘Ž๐‘Ÿ๐‘ tan ๐‘ฅ โˆ’ ๐‘™๐‘› โˆš1 + ๐‘ฅ2 + ๐‘
  • 2. 9.โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 ๐‘ข ๐‘ ๐‘–๐‘›๐‘ข ๐‘š + ๐‘šโˆ’1 ๐‘š โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2 ๐‘ข๐‘‘๐‘ข โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข๐‘‘๐‘ข = โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’1+1 ๐‘ข๐‘‘๐‘ข = โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’1 ๐‘ข ๐‘๐‘œ๐‘ ๐‘ข๐‘‘๐‘ข ๐‘ฆ = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 ๐‘ข ๐‘‘๐‘ฆ = ๐‘š โˆ’ 1๐‘๐‘œ๐‘  ๐‘šโˆ’2 ๐‘ข โˆ’ sin ๐‘ข = โˆ’( ๐‘š โˆ’ 1). ๐‘๐‘œ๐‘  ๐‘šโˆ’2 sin ๐‘ข ๐‘‘๐‘ข dx= cos u du x= sin u โ†’ โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 ๐‘ข sin ๐‘ข โˆ’ โˆซ sin ๐‘ข. โˆ’๐‘š โˆ’ 1. ๐‘๐‘œ๐‘  ๐‘šโˆ’1 = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข + ๐‘š โˆ’ 1โˆซ ๐‘ ๐‘–๐‘›2 ๐‘ข. ๐‘๐‘œ๐‘  ๐‘šโˆ’2 ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข + ๐‘š โˆ’ 1 โˆซ(1 โˆ’ ๐‘๐‘œ๐‘ 2 ๐‘ข). ๐‘๐‘œ๐‘  ๐‘šโˆ’2 ๐‘ข ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข + ๐‘š โˆ’ 1โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2 โˆ’ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข + ๐‘š โˆ’ 1โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2 โˆ’ (๐‘š โˆ’ 1)โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข + ๐‘š โˆ’ 1โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2 โˆ’ ๐‘š โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข + โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข + ๐‘š โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข โˆ’ โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข + ๐‘š โˆ’ 1 โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2 ๐‘‘๐‘ข mโˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข + ๐‘š โˆ’ 1 โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2 ๐‘‘๐‘ข โˆซ ๐‘๐‘œ๐‘  ๐‘š ๐‘ข ๐‘‘๐‘ข = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 sin ๐‘ข ๐‘š + ๐‘šโˆ’1 ๐‘š โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2 ๐‘ข ๐‘‘๐‘ข REDUKSI 1. โˆซ ๐‘‘๐‘ฅ (1โˆ’๐‘ฅ2)3 = 1 12 { ๐‘ฅ (2.3โˆ’2)(12โˆ’๐‘ฅ2)3โˆ’1 + 2.3โˆ’3 2.3โˆ’2 โˆซ ๐‘‘๐‘ฅ (1โˆ’๐‘ฅ2)3โˆ’2 = ๐‘ฅ 4(12โˆ’๐‘ฅ2)2 + 3 4 โˆซ ๐‘‘๐‘ฅ (1โˆ’๐‘ฅ2 )2 = ๐‘ฅ 4(12โˆ’๐‘ฅ2)2 + 3 4 { ๐‘ฅ (2.2โˆ’2)(1โˆ’๐‘ฅ2) + 2.2โˆ’3 2.2โˆ’2 โˆซ ๐‘‘๐‘ฅ (1โˆ’๐‘ฅ2) = ๐‘ฅ 4(12โˆ’๐‘ฅ2)2 + 3 4 { ๐‘ฅ 2(1โˆ’๐‘ฅ2) + 1 2 . 1 2 ln | 1+๐‘ฅ 1โˆ’๐‘ฅ | + ๐‘ = ๐‘ฅ 4(12โˆ’๐‘ฅ2)2 + 3๐‘ฅ 8(1โˆ’๐‘ฅ2) + 3 16 ln | 1+๐‘ฅ 1โˆ’๐‘ฅ | + ๐‘ = 2๐‘ฅ 8(1โˆ’๐‘ฅ2)2 + 3๐‘ฅ(1โˆ’๐‘ฅ2 ) 8(1โˆ’๐‘ฅ2)2 + 3 16 ln | 1+๐‘ฅ 1โˆ’๐‘ฅ | = ๐‘ = 5๐‘ฅโˆ’3๐‘ฅ3 8(1โˆ’๐‘ฅ2)2 + 3 16 ln | 1+๐‘ฅ 1โˆ’๐‘ฅ | + ๐‘ = ๐‘ฅ(5โˆ’3๐‘ฅ2 ) 8(1โˆ’๐‘ฅ2)2 + 3 16 ln | 1+๐‘ฅ 1โˆ’๐‘ฅ | + ๐‘ 3. โˆซ ๐‘๐‘œ๐‘ 5 ๐‘ฅ ๐‘‘๐‘ฅ = 1 5 (3๐‘๐‘œ๐‘ 4 ๐‘ฅ + 4๐‘๐‘œ๐‘ 2 ๐‘ฅ + 8) ๐‘ ๐‘–๐‘›๐‘ฅ + ๐‘ Rumus reduksi 7 โ†’ ๐‘๐‘œ๐‘  ๐‘š ๐‘ฅ ๐‘‘๐‘ฅ = ๐‘๐‘œ๐‘  ๐‘šโˆ’1 ๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ ๐‘š + ๐‘šโˆ’1 ๐‘š โˆซ ๐‘๐‘œ๐‘  ๐‘šโˆ’2 ๐‘ฅ ๐‘‘๐‘ฅ โˆซ ๐‘๐‘œ๐‘ 5 ๐‘ฅ ๐‘‘๐‘ฅ = ๐‘๐‘œ๐‘ 5 โˆ’1 ๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ 5 + 5โˆ’1 5 โˆซ ๐‘๐‘œ๐‘ 5โˆ’2 ๐‘ฅ ๐‘‘๐‘ฅ โˆซ ๐‘ฆ๐‘‘๐‘ฅ = ๐‘ฆ๐‘ฅ โˆ’ โˆซ ๐‘ฅ๐‘‘๐‘ฆ
  • 3. = ๐‘๐‘œ๐‘ 5โˆ’1 ๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ 5 + 4 5 โˆซ ๐‘๐‘œ๐‘ 3 ๐‘ฅ ๐‘‘๐‘ฅ = ๐‘๐‘œ๐‘ 4 ๐‘ ๐‘–๐‘›๐‘ฅ 5 + 4 5 { ๐‘๐‘œ๐‘ 2 ๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ 3 + 2 3 โˆซ ๐‘๐‘œ๐‘ ๐‘ฅ ๐‘‘๐‘ฅ} = ๐‘๐‘œ๐‘ 4 ๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ 5 + 4๐‘๐‘œ๐‘ 2 ๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ 15 8 15 ๐‘ ๐‘–๐‘›๐‘ฅ = 1 15 {3๐‘๐‘œ๐‘ 4 ๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ + 4๐‘๐‘œ๐‘ 2 ๐‘ฅ๐‘ ๐‘–๐‘›๐‘ฅ + 8๐‘ ๐‘–๐‘›๐‘ฅ} + ๐‘ = 1 15 {3๐‘๐‘œ๐‘ 4 ๐‘ฅ + 4๐‘๐‘œ๐‘ 2 ๐‘ฅ + 8} ๐‘ ๐‘–๐‘›๐‘ฅ + ๐‘ 5. โˆซ ๐‘’2๐‘ฅ (2sin 4๐‘ฅ โˆ’ 5 ๐‘๐‘œ๐‘  4๐‘ฅ)๐‘‘๐‘ฅ = 1 25 ๐‘’2๐‘ฅ (โˆ’14sin 4๐‘ฅ โˆ’ 23cos4๐‘ฅ) + ๐‘ ๐‘’2๐‘ฅ (๐ด cos4๐‘ฅ + ๐ต sin 4๐‘ฅ) โ†’ ๐‘š๐‘Ž๐‘˜๐‘Ž: ๐‘’3๐‘ฅ (2sin 4๐‘ฅ โˆ’ 5cos 4๐‘ฅ) = ๐‘’3๐‘ฅ(3๐ด + 4๐ต) ๐ถ๐‘‚๐‘† 4๐‘‹ + ๐‘’3๐‘ฅ(3๐ต โˆ’ 4๐ด)sin 4๐‘ฅ Maka: 3A+4B=-5 x3 9A+12B=-15 -4A+3B=2 x4 -16A=12B=8 _ 25A= -23 A= -23/25 3๐ต = 2 + 4๐ด = 2 โˆ’ 92 25 = โˆ’42 25 โ†” ๐ต = โˆ’14 25 โ†” ๐ธ2๐‘‹ (2sin 4๐‘ฅ โˆ’ 5 cos4๐‘ฅ)๐‘‘๐‘ฅ = ๐‘’2๐‘ฅ (โˆ’ 23 25 ๐‘๐‘œ๐‘ 4๐‘ฅ โˆ’ 14 25 sin 4๐‘ฅ) + ๐‘ = โˆ’ 1 25 ๐‘’2๐‘ฅ (23cos4๐‘ฅ + 14sin 4๐‘ฅ) + ๐‘ = 1 25 ๐‘’2๐‘ฅ (โˆ’14sin 4๐‘ฅ โˆ’ 23 ๐‘๐‘œ๐‘  4๐‘ฅ)+ ๐‘ BAB III 10. โˆซ ( sec ๐‘ฅ tan ๐‘ฅ ) 4 ๐‘‘๐‘ฅ = 1 3 ๐‘ก๐‘Ž๐‘›3 ๐‘ฅ โˆ’ 1 tan ๐‘ฅ + ๐‘ = โˆซ ( 1 ๐‘๐‘œ๐‘ ๐‘ฅ ๐‘ ๐‘–๐‘›๐‘ฅ ๐‘๐‘œ๐‘ ๐‘ฅ ) 4 ๐‘‘๐‘ฅ = โˆซ ( 1 ๐‘๐‘œ๐‘ ๐‘ฅ . ๐‘๐‘œ๐‘ ๐‘ฅ ๐‘ ๐‘–๐‘›๐‘ฅ ) 4 ๐‘‘๐‘ฅ = โˆซ ( 1 ๐‘ ๐‘–๐‘›๐‘ฅ ) 4 ๐‘‘๐‘ฅ = โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘4 ๐‘ฅ๐‘‘๐‘ฅ = โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘2 (1 + ๐‘๐‘œ๐‘ก2 ๐‘ฅ) ๐‘‘๐‘ฅ = โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘2 ๐‘‘๐‘ฅ + โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘2 ๐‘ฅ๐‘๐‘œ๐‘ก2 ๐‘ฅ ๐‘‘๐‘ฅ = โˆ’๐‘๐‘œ๐‘ก๐‘ฅ + โˆซ ๐‘๐‘œ๐‘ก2 ๐‘ฅ๐‘๐‘œ๐‘ ๐‘’๐‘2 ๐‘ฅ ๐‘‘๐‘ฅ = โˆ’๐‘๐‘œ๐‘ก๐‘ฅ + โˆซ ๐‘๐‘œ๐‘ก2 ๐‘ฅ ๐‘‘(โˆ’๐‘๐‘œ๐‘ก๐‘ฅ) = โˆ’๐‘๐‘œ๐‘ก๐‘ฅ + โˆ’ 1 3 ๐‘๐‘œ๐‘ก3 ๐‘ฅ + ๐‘ = โˆ’ 1 3๐‘ก๐‘Ž๐‘›3 ๐‘ฅ โˆ’ 1 ๐‘ก๐‘Ž๐‘›๐‘ฅ + ๐‘ 13. 15. โˆซ ๐‘๐‘œ๐‘ก3 ๐‘ฅ ๐‘‘๐‘ฅ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ = โˆซ ๐‘๐‘œ๐‘ก2 ๐‘ฅ.๐‘๐‘œ๐‘ก๐‘ฅ ๐‘‘๐‘ฅ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ = โˆซ (๐‘๐‘œ๐‘ ๐‘’๐‘2 ๐‘ฅโˆ’1).cot ๐‘ฅ ๐‘‘๐‘ฅ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ = โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘2 ๐‘ฅ.cot ๐‘ฅ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ ๐‘‘๐‘ฅ โˆ’ โˆซ cot๐‘ฅ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ ๐‘‘๐‘ฅ = โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ฅ. cot ๐‘ฅ ๐‘‘๐‘ฅ โˆ’ โˆซ cos ๐‘‘๐‘ฅ
  • 4. = -cosec x โ€“ sin x+c = -sin x- cosec x +c BAB IV 9. โˆซ โˆš25โˆ’๐‘ฅ2 ๐‘‹ = 5ln | 5โˆ’โˆš25โˆ’๐‘ฅ2 ๐‘ฅ | + โˆš25โˆ’ ๐‘ฅ2 + ๐‘ a=5 b=1 u= x ๐‘ข = ๐‘Ž ๐‘ sin ๐‘ง ๐‘ฅ = 5 ๐‘ ๐‘–๐‘›๐‘ง dx= 5 cos z sin ๐‘ง = ๐‘ฅ 5 โˆš25 โˆ’ ๐‘ฅ2 = ๐‘Ž cos ๐‘ง = 5cos ๐‘ง โˆซ โˆš25โˆ’๐‘ฅ2 ๐‘‹ ๐‘‘๐‘ฅ = โˆซ (5 cos ๐‘ง)(5cos ๐‘ง) 5 sin ๐‘ง = โˆซ 25 ๐‘๐‘œ๐‘  2 ๐‘ง 5 sin ๐‘ง ๐‘‘๐‘ง = 5 โˆซ ๐‘๐‘œ๐‘ 2 ๐‘ง sin ๐‘ง ๐‘‘๐‘ง = 5 โˆซ (1โˆ’๐‘ ๐‘–๐‘›2 ๐‘ง) sin ๐‘ง ๐‘‘๐‘ง = 5(โˆซ 1 ๐‘ ๐‘–๐‘›๐‘ง ๐‘‘๐‘ง โˆ’ โˆซ sin ๐‘ง ๐‘‘๐‘ง = 5 โˆซ ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ง ๐‘‘๐‘ง โˆ’ 5 โˆซ sin ๐‘ง ๐‘‘๐‘ง = 5| ๐‘๐‘œ๐‘ ๐‘’๐‘ ๐‘ง โˆ’ cot ๐‘ง| + 5 cos ๐‘ง + ๐‘ = 5| 5 ๐‘ฅ โˆ’ โˆš25โˆ’๐‘ฅ2 ๐‘ฅ |+ 5. โˆš25โˆ’๐‘ฅ2 ๐‘ฅ + ๐‘ = 5| 5โˆ’โˆš25โˆ’๐‘ฅ2 ๐‘ฅ | + โˆš25 โˆ’ ๐‘ฅ2 + ๐‘ 13. BAB V 12. โˆซ ๐‘ฅ2 +3๐‘ฅโˆ’4 ๐‘ฅ2โˆ’2๐‘ฅโˆ’8 ๐‘‘๐‘ฅ = ๐‘ฅ + ln|(๐‘ฅ + 2)(๐‘ฅ โˆ’ 4)4| + ๐‘ โ†’ ๐‘ฅ2 โˆ’ 2๐‘ฅ โˆ’ 8 1 โˆš๐‘ฅ2+3๐‘ฅโˆ’4 ๐‘ฅ2โˆ’2๐‘ฅโˆ’8 5๐‘ฅ+4 โˆ’ โ†’ โˆซ 1 + 5๐‘ฅ+4 ๐‘ฅ2โˆ’2๐‘ฅโˆ’8 ๐‘‘๐‘ฅ โ†’๐‘ฅ2 โˆ’ 2๐‘ฅ โˆ’ 8 = (๐‘ฅ + 2)(๐‘ฅ โˆ’ 4) 5๐‘ฅ+4 ๐‘ฅ2 โˆ’2๐‘ฅโˆ’8 = ๐ด ๐‘ฅ+2 + ๐ต ๐‘ฅโˆ’4 dikali (x+2)(x-4) 5x+4 = A(x-4)+B(x+2) = (A+B)x-4A+2B A=1,B=4 โ†’โˆซ 1 + 5๐‘ฅ+4 ๐‘ฅ2 โˆ’2๐‘ฅโˆ’8 ๐‘‘๐‘ฅ = โˆซ 1 ๐‘‘๐‘ฅ + โˆซ ๐ด ๐‘‘๐‘ฅ (๐‘ฅ+2) + โˆซ ๐ต ๐‘‘๐‘ฅ (๐‘ฅโˆ’4) = ๐‘ฅ + โˆซ ๐‘‘๐‘ฅ (๐‘ฅ+2) + 4โˆซ ๐‘‘๐‘ฅ ๐‘ฅโˆ’4 = ๐‘ฅ + ln( ๐‘ฅ + 2) + 4ln( ๐‘ฅ โˆ’ 4) + ๐‘ = ๐‘ฅ + ln|(๐‘ฅ + 2)(๐‘ฅ โˆ’ 4)4| + ๐‘