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If the tangents to the graph of the function `y= f(x)` make angle `(pi)/(4)` and `(pi)/(3)` with the x- axis at the point `x=2` and `x=4` respectively, then the value of `int_(2)^(4) f'(x)f''(x) dx ` is-

A

`f(4)`

B

`f(2)`

C

0

D

1

Text Solution

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The correct Answer is:
D
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