Problema 2. / Problem 2.


Si \frac{1}{a}+\frac{1}{b}+\frac{1}{c}=3,  calcule el valor de

\frac{\left(\cfrac{1-a}{a}\right)^3+\left(\cfrac{1-b}{b}\right)^3+\left(\cfrac{1-c}{c}\right)^3}{\left(\cfrac{1}{a}-1\right)\left(\cfrac{1}{b}-1\right)\left(\cfrac{1}{c}-1\right)}

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