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  • For some constants a and b, find the derivative of x - a x- b

7.(i)  For some constants a and b, find the derivative of ( x - a ) ( x -b ) 

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best_answer

Given

f(x)=( x - a ) ( x -b )=x^2-ax-bx+ab

As we know, the property,

f'(x^n)=nx^{n-1}

and the property 

\frac{d(y_1+y_2)}{dx}=\frac{dy_1}{dx}+\frac{dy_2}{dx}

applying that property we get 

f'(x)=2x-a-b

 

Posted by

Pankaj Sanodiya

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