alchemist009 wrote:
If x^3 < 16x which of the following includes at least some of the possible solutions for x, but no values that are not solutions?
A. |x| < 4
B. x < 4
C. x > 4
D. x < -4
E. x > 0
x^3 < 16x
x(x^2-16) < 0
(x+4)x(x-4) < 0
So, x<-4 or 0<x<4
Only option D satisfies the condition.
Answer D
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