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November 28, 2014

November 28, 2014

Posted by **sarah** on Wednesday, January 18, 2012 at 1:59pm.

x^4<16x^2

- algebra -
**Steve**, Wednesday, January 18, 2012 at 2:40pmx^4 < 16x^2

x^2(x^2 - 16) < 0

x^2 is always positive, so

x^2 < 16

so, for -4 < x < 4

x^4 < 16x^2

at x=0, x^4 = 16x^2, so 0 is excluded from the solution

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