Question

find the 7th term of a geometric sequence with t1=5 and r=-2

Answer 1

Hello,

$t_{1}=5$
$t_{2}=5*(-2)$
$t_{3}=5*(-2)^2$

$t_{n}=5*(-2)^{n-1}$

$t_{7}=5*(-2)^6=320$