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Let f (x) = sqrt( x - 1) + sqrt( x + ...

Let ` f (x) = sqrt( x - 1) + sqrt( x + 24 - 10 sqrt( x - 1)), 1 lt x lt 26 ` be real- valued function, the ` f'(x) " for " 1 lt x lt 26` is a)0 b)`(1)/( sqrt( x - 1))` c)`(2)( sqrt( x - 1))` d)None of these

A

0

B

`(1)/( sqrt( x - 1))`

C

`2 sqrt( x - 1)`

D

None of these

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The correct Answer is:
A
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