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A line tangent to the graph of the function `y =f(x)` at the point x = a forms an angle `pi/3` with the axis of Abscissa and angle `pi/4` at the point x=b then `int_a^b f''(x) dx` is

A

`0`

B

`1- sqrt3`

C

`sqrt(2) -1`

D

`sqrt(3) -1`

Text Solution

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The correct Answer is:
B
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