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Question

Find the derivative of y=x2+1


A

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B

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C

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D

none of these

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Solution

The correct option is B


y=x2+1
x2+1=u ....(1)
dudx=2x ....(2)
y=u
Now, dydx=dydu×dudx
=12u×dudx
=12x2+1×2x From (1) & (2)
dydx=xx2+1


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