Question

in aGP, tn=(-1)n.2017find the common ratio?

Answer 1

$t( n ) = (- 1)n .2017$

$t( n - 1) = (- 1)(n - 1).2017$
common ratio=
$\frac{tn}{t(n - 1)} = \frac{n}{n - 1}$