Question

Determine o quinto termo da P. G. Na qual a1=6 e q= -2

Answer 1

$a_1=6 \\ a_6=? \\ n=6 \\ q=-2 \\ \\ PG= a_n=a_1.q^{n-1} \\ \\ a_6=6.(-2)^{6-1} \\ a_6=6.(-2)^5 \\ a_6=6.(-32) \\ a_6=-192$

Answer 2

.
$a_n=a_5 \\ a_1=6 \\ n=5 \\ q=-2 \\ \\ a_n=a_1.q^{n-1} \\ \\ a_5=6.(-2)^{5-1} \\ \\ a_5=6.(-2)^4 \\ \\ a_5=6(16) \\ \\ a_5=96$