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If y=(x+sqrt(1+x^(2)))^(n), then (1+x^(2...

If `y=(x+sqrt(1+x^(2)))^(n)`, then `(1+x^(2))(d^(2)y)/(dx^(2))+x(dy)/(dx)` is

A

`n^(2)y`

B

`-n^(2)y`

C

(-y)

D

`2x^(2)y`

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The correct Answer is:
A
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