Answer
$\text{
geometric
}$;
$a_1=
\dfrac{8}{3}
$;
$r=
\dfrac{3}{2}
$
Work Step by Step
The sequence $
\dfrac{8}{3},4,6,...
$ forms a geometric sequence with $a_1=\dfrac{8}{3}$ and $r=\dfrac{3}{2}$.
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