Hills and Valleys

Algebra Level 2

Find the average of all real values of x x which satisfies the following expression:

x 4 − 4 x 2 x 4 − 18 x 2 + 81 ≤ 0 \frac{x^{4}-4x^{2}}{x^{4}-18x^{2}+81}\leq0


The answer is 0.

Nanayaranaraknas Vahdam by Nanayaranaraknas Vahdam , 22, India

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1 solution

Michael Mendrin
May 10, 2014

It's a symmetric function.

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