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Let h(x) be differentiable for all x and let `f(x)=(kx+e^x)h(x),` where k is some ccnstant. If h(0) = 5,h'(0)=-2,and f' (0) = 18, then the value of k is
A. |
5 |
B. |
4 |
C. |
3 |
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D. |
2.2 |