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\(Let\ a\ be\ a\ non-zero\ number. Calculate\ a \cdot \frac{1}{a} + a \cdot \frac{1}{-a}$.\)

 Mar 29, 2023
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\(a\times\frac{1}{a}+a\times\frac{1}{-a}=1+(-1)=0\)

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 Mar 29, 2023

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