Question

Determinati valorile intregi ale numarului a, diferite de 0 pt care $\frac{a-4}{a}$ este nr intreg.
Cum fac? ajutor va rog

Answer 1

$a=4==> \frac{a-4}{a} =\frac{4-4}{4}= 0$ ∈ Z

$a=-4==> \frac{a-4}{a} =\frac{-4-4}{-4}= \frac{-8}{-4} = 2$ ∈ Z

$a=-2==> \frac{a-4}{a} =\frac{-2-4}{2}= \frac{-6}{-2} = 3$ ∈ Z

$a=-1==> \frac{a-4}{a} =\frac{-1-4}{-1}= \frac{-5}{-1} = 5$ ∈ Z