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Question Number 148482 by mathdanisur last updated on 28/Jul/21

Commented by hknkrc46 last updated on 28/Jul/21

$$★\frac{1}{78}+\frac{2}{79}+\frac{3}{80}-3$$$$=(\frac{1}{78}-1)+(\frac{2}{79}-1)+(\frac{3}{80}-1)$$$$=\frac{-77}{78}+\frac{-77}{79}+\frac{-77}{80}$$$$=-77(\frac{1}{78}+\frac{1}{79}+\frac{1}{80})$$$$★\frac{-77(\frac{1}{78}+\frac{1}{79}+\frac{1}{80})}{\frac{1}{78}+\frac{1}{79}+\frac{1}{80}}=-77$$

Commented by mathdanisur last updated on 28/Jul/21

$$ThankyouSer$$

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