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Let f be twice differentiable function s...

Let f be twice differentiable function such that `f^('')(x) = -f(x)` and `f^(')(x) = g(x)`. Also `h(x) = [f(x)]^(2) + [g(x)]^(2).` If h(4) = 7, then h(7) =

A

0

B

5

C

4

D

7

Text Solution

Verified by Experts

The correct Answer is:
D
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