5. Sk2tch the 7
"::iph a;:ad show all local extrema and inf:ection points.
29) y '~ . x4 + 2x2 - 9 29) - - -
A) Absolute maxima : (--1 , -- 8), (1, - 8) B) Absolute n<axima: (- 1, - 8), (1 , -8)
rn;,.?chon p omts: [ -
.. . . (1 9"J lV3"' 9'J
::;·,
8 ~ ( fi 8
Locc:l minimum : (0, - 9)
No inflection points
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.. ····(,%• .. ... ..
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C) At:;olute JT.in ima ( - 1, 8), (1, 8) D) Absolute maxima : (- 1, - 8), (1, - 8)
Local mc.x im c :-'l: (0, 9) Local minimum : (0, - 9)
In i'lection
.. point·' [-~ ' 76] ' ·r~fl ' 76]
3 9 3 9
, . .
I nLcctlon pomts: r
r ,~ ,-8],[ 11 81
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ill . ty
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x
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5* . . . -5
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,!,
10
6. -- ---------- ------------·- ··- -- ~--------------~~-------------
30) y = x --sin x, 0 :<: x :<: 271 30)
A) Lc~a l m ; ~i mum : (0, 0) B) Local m inimunr (0, 0)
Loca l ma ximum: (271, 271) Local maximum: (271, 271 )
Inf:2ction point: (11, ;-r ) In flection point: (11, 11)
,.,
iy
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-
, . ;.
J ~~~---+----4-----~--~~~
11
2
11
311
2
211
X
C) Local m in m u m (0, 0) D) Local minimum: (0, 0)
Local m &xi mum : (271, 2 n ) Loca l maximum: (271, 2n)
No inflection points No inflection points
4
2
rr 311 X 311
11 2rr rr 211
2 2 2
J1
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-··~· ~--.r ........~......... ...-.. .:...:....- ... _,,;_.,. • ...._...... ,._.,.,...
.-...., .. ...... . =--.--.,..._..._. . . . . . . ~~~~·--------------·----
,,......,l*W!',...-....,.a.... ·
For t~1~ giver, "'·• ;"ssion y ', find y " and sketch the general shape of the graph of y = f(x).
x2
32; y' = -;:::- -- 1 32) - - -
L
A) B)
y
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C) D)
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10. "'r:. h
34) y' = x-lt-'(x - J;
1
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C) D)
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15