Question

O sexto termo (a6) da PG (4,8,16,...) é :

Answer 1

.
$a_n=a_6 \\ a_1=4 \\ n=6 \\ r=q=8\div4=2 \\ \\ a_n=a_1.q^{n-1} \\ \\ a_6=4.2^{6-1} \\ \\ a_6=4.2^5 \\ \\ a_6=4.(32) \\ \\ a_6=128$

Answer 2

an= a1.qn-1 a6=4.26-1 a6= 4.25 a6=4.32 a6=128