27.
(A)(C)28.
(A)
(B)
(C)
(D)
(E)
29.
(A)
(B)
(C)
(D)
(E)30.(A)
(B)
(C)
(D)
(E)
31.(D)
(E)(B)(D)
(E)−20 0 ∞ 0 1 2 ∞CHALLENGE
The number of values of k for which f(x) = ex and g(x) = k sin x have a
common point of tangency is
0
1
2
large but finite
infiniteThe curve 2x^2 y + y^2 = 2x + 13 passes through (3,1). Use the line tangent
to the curve there to find the approximate value of y at x = 2.8.