Question

$\frac{a}{a+b+c}+ \frac{b}{a+b+c}+ \frac{c}{a+b+c} a+b+c$ diferit de 0

Answer 1

Daca fractiile au acelasi numitor, vom obtine, la rezultat, o fractie cu numitorul comun, iar la numarator scriem suma celor trei numaratori ai fractiilor date.

$\dfrac{a}{a+b+c}+\dfrac{a}{a+b+c}+\dfrac{a}{a+b+c}\ =\ \dfrac{a+b+c}{a+b+c}= 1$