Engineering Board Exam Reviewer · Higher-Order Derivatives · easy

Find d2y/dx2 if y=x4-3x2+2x.

1. 12 x2 - 6
2. 4 x3 - 6 x + 2
3. 12 x2 - 4
4. 24 x

Answer

A. 12 x2 - 6

Solution

y'=4x3-6x+2 and y''=12x2-6.

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