AP Calc
posted by Yuri .
If y=2x2 , what is the minimum value of the product xy?
A. 16 B. 8 C. 4 D. 0 E. 2

z = xy = 2(x^2x)
dz/dx = 0 at min = 2(2x1)
x = 1/2
y = 1
xy = 1/2
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