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Question

Differentiate the following functions with respect to x :

(2x1x2+1)

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Solution

Using quotient rule, we have

ddx(2x1x2+1)

=(x2+1)ddx(2x1)(2x1)ddx(x2+1)(x2+1)2

=(x2+1)×2(2x1)×2x(x2+1)2=2x24x2+2x(x2+1)2

=2x2+2x+2(x2+1)2

=2(x2+x+1)(x2+1)2=2(1+xx2)(1+x2)2


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