Question

urgent va roggg
a) a/a+b + b/a+b,a+b egal taiat 0
b)a/a+b+c + b/a+b+c + c/a+b+c,a+b+c egal taiat 0​

Answer 1

Explicație pas cu pas:

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