2004
Mathematics
JAMB
Find the derivatives of the function y = 2x2(2x - 1) at the point x = -1
A.
18
B.
16
C.
-4
D.
-6
Correct Answer: 16
Explanation
y = 2x2(2x - 1) y = 4x3 - 2x2 dy/dx = 12x2 - 4x at x = -1 dy/dx = 12(-1)2 - 4(-1) = 12 + 4 = 16
y = 2x2(2x - 1) y = 4x3 - 2x2 dy/dx = 12x2 - 4x at x = -1 dy/dx = 12(-1)2 - 4(-1) = 12 + 4 = 16THIS WEEK's
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