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The question is very simple but my brain forgot some theory for 5-6 years. Please help me

I have this simple |4x-2| >= -1

Sorry if I took your time for explanation.

Thank you

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    This is definitely not a question about modules. Perhaps you refer to $|\cdot |$ as *modulus*? Also, the inequality you give is true for all $x$, since $|\cdot |$ always gives a nonnegative number.2012-09-25
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    @AlexBecker: True, sorry for my bad english2012-09-25

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