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If y=2^(n+1)+(3)/(x^(n)), then x^(2)(d^(...

If `y=2^(n+1)+(3)/(x^(n))`, then `x^(2)(d^(2)y)/(dx^(2))` is

A

y

B

`6n(n+1)y`

C

`n(n+1)y`

D

`x(dy)/(dx)+y`

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