Q. 174.7( 3 Votes )

Find the derivati

Answer :

Let

We need to find the derivative of f(x) i.e. f’(x)


We know that,


…(i)





Putting values in (i), we get



Now rationalizing the numerator by multiplying and divide by the conjugate of



Using the formula:


(a + b)(a – b) = (a2 – b2)




Using the formula:










Putting h = 0, we get





Hence,


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