Question

 Qual é o 3º termo da P.G. que a1=3 e q=2?

a) 6

b) 18

c) 5

d) 10

Answer 1

$\large\boxed{\begin{array}{l}\tt dados\begin{cases}\sf a_1=3\\\sf q=2\\\sf a_3=?\end{cases}\\\underline{\boldsymbol{soluc_{\!\!,}\tilde ao\!:}}\\\sf a_3=a_1\cdot q^2\\\sf a_3=3\cdot2^2\\\sf a_3=3\cdot4\\\sf a_3=12\\\sf (3,6,12...)\end{array}}$