Question

Calcule o 5°termo da PG ( 3, -6, 12, ...).

Answer 1

$\boxed{a_n=a_1*q^n^-^1}\\\\ q=\frac{a_2}{a_1}=\frac{-6}{3}=-2\\\\ a_5=3*-2^4\\\\ a_5=3*16\\\\ \boxed{a_5=48}$