How do you find the first five terms of the geometric sequence for which $a_1=-2$ and r=3?

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Answer 1 · 2017-02-20T08:42:21

$"The first five terms are: " -2,-6,-18,-54,-162$

A GP has the form

$a, ar, ar^2,ar^3,...$

$"where " a="first term" , r="common ratio"$

in this case

$a_1=a=-2 , r=3$

$1st=-2$

$2nd=-2xx3=-6$

$3rd=-6xx3=-18$

$4th=-18xx3=-54$

$5th=-54xx3=-162$

$"The first five terms are: " -2,-6,-18,-54,-162$

How do you find the first five terms of the geometric sequence for which a_1=-2a_1=-2 and r=3?