Calculus Worksheet Page 4
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69. When the area in square units of an expanding circle is increasing twice as fast as its radius in linear
units, the radius is
1
1
1
(A)
(B)
(C)
(D) 1
(E)
4
4
2/ x
10. If
f x
e
, then
f x
2
2/x
2
(B)
x
2/ x
x
x
2/
2/
2/
2
e
(A)
2
e
ln
x
e
(C)
(D)
e
(E)
2
x e
2
x
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