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Question

Differentiate the given function w.r.t. x.
cos(logx+ex),x>0

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Solution

Let y=cos(logx+ex),x>0
Thus using chain rule,
dydx=sin(logx+ex).ddx(logx+ex)
=sin(logx+ex).[ddx(logx)+ddx(ex)]
=sin(logx+ex).(1x+ex)
=(1x+ex)sin(logx+ex),x>0

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