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Let f be twice differentiable function, ...

Let f be twice differentiable function, such that `f'(x) = - f(x) and f'(x) = g(x), h(x) = [f(x)]^(2) + [g(x)]^(2)`. Find h(10), if h(5) = 11

A

0

B

9

C

11

D

None of these

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