If x=f(t),y=g(t), then (d^(2)y)/(dx^(2))...

If `x=f(t),y=g(t)`, then `(d^(2)y)/(dx^(2))` is

A

`(f'(t)*g''(t)-g'(t)*f''(t))/([f'(t)]^3)`

B

`(f'(t)*g''(t)-g'(t)*f''(t))/([f'(t)]^2)`

C

`(g'(t)*f''(t)-f'(t)*g''(t))/([f'(t)]^3)`

D

`(g'(t)*f''(t)+f'(t)*g''(t))/([f'(t)]^3)`.

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