Question

Me ajudem nessa questão, Tem alternativas!

Answer 1

Resposta:

$(-1)^{n}+(-1)^{n+1}$

$(-1)^{n}+(-1)^{n}.(-1)$

$(-1)^{n}.[1+(-1)]$

$(-1)^{n}.[1-1]$

$(-1)^{n}.0 = 0$