Geometric Sequences (HSC SSCE Mathematics Advanced): Quizzes

Each term is obtained by multiplying

$r = 4$

No, ratios are $2, 4, 2$ (not all equal)

$T_n = ar^{n-1}$

The power of $r$ is one less than term number

It would make the next ratio undefined

Terms alternate between positive & negative

$T_5 = 162$

Yes, it is $T_4$

GPs are integer points on exponential graphs