How do i show that the inequality(adsbygoogle = window.adsbygoogle || []).push({});

|x-3| >= |x|-|3| holds for any x contained in R (real values).

and in the function f(x) = (x^2)/(1-x^2) would it be correct to say that x^2 cannot be equal to 1 because that would cause the function to have no real solution?

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# Inequality problem

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