If y=at^2+2bt-cand t = ax^2+2bx+c, then...

If `y=at^2+2bt-c`and ` t = ax^2+2bx+c`, then`(d^3y)/(dx^3)` equals

A

`24a^(2)(at+b)`

B

`24a(ax+b)^(2)`

C

`24a(at+b)^(2)`

D

`24a^(2)(ax+b)`

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The correct Answer is:

D

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