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  • Find the derivative of the following functions from first principle:- x

1(i)   Find the derivative of the following functions from first principle: -x 

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best_answer

Given.

f(x)=-x

Now, As we know, The derivative of any function at x is 

f'(x)=\lim_{h\rightarrow 0}\frac{f(x+h)-f(x)}{h}

f'(x)=\lim_{h\rightarrow 0}\frac{-(x+h)-(-x)}{h}

f'(x)=\lim_{h\rightarrow 0}\frac{-h}{h}

f'(x)=-1

Posted by

Pankaj Sanodiya

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