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If f(x) satifies of conditiohns of Rolle...

If f(x) satifies of conditiohns of Rolle's theorem in [1,2] and f(x) is continuous in [1,2] then `:.underset(1)overset(2)intf'(x)dx` is equal to

A

3

B

0

C

1

D

2

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The correct Answer is:
B
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