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Si \displaystyle{\frac{2}{a}+\frac{7}{3}=0} et \displaystyle{\frac{2}{...
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Si \displaystyle{\frac{2}{a}+\frac{7}{3}=0} et
\displaystyle{\frac{2}{3}+\frac{7}{b}=0} , que vaut
a+b?
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