Find the derivative of the function y 2x 2 2x -... - JAMB Mathematics 2021 Question
Find the derivative of the function y = 2x\(^2\)(2x - 1) at the point x = -1
A
-4
B
16
C
18
D
-8
correct option: b
***
y = 2x\(^2\)(2x - 1)
y = 4x\(^3\) - 2x\(^2\)
dy/dx = 12x\(^2\) - 4x
at x = -1,
dy/dx = 12(-1)\(^2\) - 4(-1)
= 12 + 4 = 16
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