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Question

If y=[x+x2+a2]n, then prove that dydx=nyx2+a2

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Solution

Given,

y=(x+x2+a2)n

differentiating on both sides, we get,

dydx=n(x+x2+a2)n1(1+xx2+a2)

=n(x+x2+a2)n1(x2+a2+xx2+a2)

=n(x+x2+a2)n1+1x2+a2

=n(x+x2+a2)nx2+a2

dydx=nyx2+a2

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