A chapter I am reading says that with "[tex]\frac{1}{x}[/tex]=[tex]\frac{1}{2x+1}[/tex][tex]\Rightarrow[/tex]2x+1=x", the [tex]\Rightarrow[/tex]cannot be replaced by [tex]\Leftrightarrow[/tex], but if a = b, does not 1/a necessarily = 1/b? Is this a misprint or are they right? If they are right, could you illustrate this with an example please?(adsbygoogle = window.adsbygoogle || []).push({});

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# Implication math problem

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