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int f(x) dx = g(x), then int f(x)g(x) dx...

`int f(x) dx = g(x)`, then `int f(x)g(x) dx =`

A

`1/2g^(2)(x)`

B

`1/2f^(2)(x)`

C

`f(x)^(')g(x)`

D

`1/2[g^(')(x)]^(2)`

Text Solution

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The correct Answer is:
A
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