Unit 5 Limits and Derivatives Test Review
[Pages:5]Unit 5 Limits and Derivatives Test Review
(x + h)2 x2
1. What is lim
h!0
h
?
A. 2xh B. 2x
C. h
D. 0
5. At which of the ve points shown on the graph
dy
d2y
are dx and dx2 both negative?
2. The functions f and g are di erentiable and have the values shown in the table.
If A = f g, then A0(4) =
A. 0 B. 114 C. 83 D. 29
x f f0 05 1 28 3 4 14 9 6 26 27
g g0
7
1 4
51
34
1 16
3. The functions f and g are di erentiable and have the values shown in the table.
If A = f (g(x)), then A0( 8) =
A. 72 B. 18 C. 54 D. 9
x f f 0 g g0 84 3 2 6 6 10 12 0 9 2 20 9 6 18 2 30 15 12 24
4. The table shows the position of an object moving along a line at 10 second intervals.
Estimate the velocity, in units/sec, at t = 35.
t (sec)
0
position 4
10 20 30 40 12 26 44 68
A. 2.400 B. 2.400
C. 11.200 D. 3.842
A. A
B. C
C. D
D. E
6.
Find all open intervals on which f (x) = x2
x 5x + 4
is increasing.
A. ( 1; 1) B. ( 2; 2)
C. ( 1; 2) D. (2; 1)
7.
Let
f
(x)
=
x
3 2
on
[0; 4]
Which of the hypotheses of Rolle's Theorem are not satis ed on the given interval?
I. f is di erentiable in (a; b)
II. f is continuous at x = a and x = b
III. f (a) = f (b) = 0 IV. there is no c in (a; b) for which f 0(c) = 0
A. III and IV B. IV only
C. I and IV D. III only
page 1
8. Given the function f (x) = x(x2 8) 5 satis es the hypothesis of the Mean Value Theorem on the interval [1; 4], nd a number C in the interval (1; 4) which satis es this theorem.
p A. 7
B. 12
C. 7
D. 5
14. For what x coordinate(s) does the function de ned by f (x) = 3x5 5x3 8 have a relative maximum?
A. 1 only B. 0 and 1
C. 1 only D. 1 and 1
9. If y = 12px, what is the tangent line used to nd approximate values of y for x near 9?
A. y = 36 2(x 9) B. y = 36 + 2(x 9)
C. y = 36 2(x 9) D. y = 2 36(x 9)
15. Find the derivative of x2f (x).
A. x xf 0(x) + 2f (x) B. 2xf 0(x)
C. x xf (x) + 2f 0(x)
D.
1 3
x3
+
f 0(x) 2
10. If f (x) = x3 3x2 x + 7, determine its point of in ection.
A. (1; 4) B. (2; 1)
C. (3; 4) D. ( 1; 4)
11. Given that f 0(x) = x sin x for 0 < x < 4 , then f has a local maximum for x
A. 2.029 B. 3.141 C. 1.820 D. 1.571
1 cos 2x
12. lim
x!0
x2
is
A. 2
B.
3 2
C. 4
D. 0
16. If f (x) p= (2x + 3)5, then the fth derivative of f (x) at x = 2 is equal to
A. 3840
p
p
p
B. 120 2 C. 240 2 D. 25 2
2
17. Suppose f (x) = x5 and let h(x) be the inverse of f . Find h0(32).
A.
1 80
B. 80
C.
1 32
D.
1 32
18. Di erentiate: f (x) = arcsin(7x)
7 A.
p 1 7x2 7
B. p 1 49x2
7 C.
p 1 49x2 7
D. p 1 x2
13.
A
curve
is
de
ned by
y = esin 2x.
Find
dy dx .
A. esin 2x cos 2x B. 2esin 2x cos 2x
C. sin 2xecos 2x D. 4 sin 4x
19. Find f 0(x) given f (x) = cos4(3x).
A. 4 cos3(3x) B. 12 sin 3x cos3(3x)
C. 4 cos3(3x) D. 12 cos2(3x)
page 2
Unit 5 Limits and Derivatives Test Review
20.
Find
dy dx
given
y2
3xy + x2 = 7.
A.
3y 2y
2x 3x
2x B. 3 2y
C.
2x y
2y 3x D. 3y 2x
24. In a right triangle the hypotenuse is of xed length of 15 units, one side is increasing in length by 4 units per second while the third side is decreasing in size. At a certain instant the increasing side is of length 9 units. Find the rate of change of the third side at the same instant.
A. 3 units/sec
B.
3 2
units/sec
C.
5 4
units/sec
D.
3 4
units/sec
21. What is the slope of the tangent line to
xy + ln 2x =
1 2
at
the
point
(
1 2
;
1)?
A. 6
B.
2 3
C.
1 6
D.
1 6
22. An open box can be made from a square piece of material, by cutting equal squares from each corner and turning up the sides. Find the dimensions of the box of maximum volume if the material has dimension 6 cm by 6 cm.
A. 4 cm 4 cm 1 cm
B. 3 cm 3 cm 3 cm
C. 3:5 cm 3:5 cm 1:25 cm
D. 5 cm 5 cm 0:5 cm
23. A balloon rises vertically at the rate of 10 ft/s. A person on the ground 100 ft away from the spot below the rising balloon watches the balloon ascend; at what rate is the distance between balloon and observer changing when the balloon is 100 ft above ground?
p A. 5 2 ft=s
p B. 2 ft=s
2
p C. 11 2 ft=s
2 p D. 2 2 ft=s
25. Let f be de ned as follows:
( x2 f (x) = x
9 3
for x 6= 3,
1
for x = 3
Which of the following are true about f ?
I. lim f (x) exists
x!3
II. f (3) exists
III. f (x) is continuous at x = 3
A. None B. II only
C. I and II only D. I, II, and III
8x3 1
26.
lim
x!
1 2
10x2
= 7x + 1
A. 2
B.
8 3
C.
1 2
D. 0
sin 9x
27.
lim
x!0
sin 5x
=
A.
9 5
B. 1
C. 0
D.
5 9
page 3
Unit 5 Limits and Derivatives Test Review
jxj
28.
lim
x!0
x
is
A. 1 B. 1
C. 0
D. 1
e5x
30.
lim
x!1
ln
2x
is
A. 1
B. 0
C. 5e
D. 1
5 29. lim is
x!0+ x2
A. 1
B. 1 C. e
D. 1
page 4
Unit 5 Limits and Derivatives Test Review
1.
Answer:
B
2.
Answer:
D
3.
Answer:
C
4.
Answer:
A
5.
Answer:
A
6.
Answer:
B
7.
Answer:
D
8.
Answer:
A
9.
Answer:
B
10.
Answer:
A
11.
Answer:
B
12.
Answer:
A
13.
Answer:
B
14.
Answer:
A
15.
Answer:
A
16.
Answer:
A
17.
Answer:
A
18.
Answer:
B
19.
Answer:
B
20.
Answer:
A
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Unit 5 Limits and Derivatives Test Review
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29. Answer:
30. Answer:
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