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If y = 8x3 - 3x2 + 7x - 1, find \(\frac{\mathrm d^...

If y = 8x3 - 3x2 + 7x - 1, find d2ydx2.

A.

48x - 6

B.

11x2 + 6x - 7

C.

32x + 7

D.

24x2 - 6x + 7

Correct answer is A

y = 8x3 - 3x2 + 7x - 1

d2ydx2=ddx(dydx)

= ddx(24x26x+7)

d2ydx2=48x6