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Mathematics 14 Online
OpenStudy (anonymous):

Identify the 8th term of the geometric sequence -2, -12, -72 ...

OpenStudy (solomonzelman):

you multiply times 6 every time, so the 8th term would be \(\normalsize\color{black}{ (-2) \times 6^{(8-1)} }\)

OpenStudy (anonymous):

unn -559872

OpenStudy (anonymous):

howd you get the 8-1

OpenStudy (solomonzelman):

because to get to the 2 term you add the difference 1 time, to get to the 4th term you add the difference five times

OpenStudy (solomonzelman):

so to get the 8th term, you add 7 the difference times.

OpenStudy (anonymous):

ohhh

OpenStudy (solomonzelman):

In this case (in geometric sequence) you multiply the common ratio 7 times to get to the 8th term.

OpenStudy (anonymous):

gotcha

OpenStudy (solomonzelman):

okay ....

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