Question

Se a1 = -2 e a razão q=1/5 quanto vale a6

Answer 1

$a_n = a_m*q^{n-m}\\ a_6 = -2* (\frac{1}{2})^5 \\ a_6 = -2* \frac{1}{2^5} = - \frac{1}{2^4} = -\frac{1}{16}$