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let y=t^(10)+1, and x=t^8+1, then (d^2y)...

let `y=t^(10)+1,` and `x=t^8+1,` then `(d^2y)/(dx^2)` is

A

` (5t)/( 2)`

B

` (5)/( 16t)^(6)`

C

` 20t^(8)`

D

` 8t^(7)`

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The correct Answer is:
B
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