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Mathematics 17 Online
OpenStudy (anonymous):

algebra 2

OpenStudy (anonymous):

OpenStudy (anonymous):

@agent0smith

OpenStudy (agent0smith):

Looks geometric. First: Find the common ratio by dividing a term by the one before it.

OpenStudy (anonymous):

what?

OpenStudy (anonymous):

ooooh

OpenStudy (anonymous):

-4

OpenStudy (agent0smith):

Yep. S7 means you need the first 7 terms. Just keep multiplying by 4, till you have 7 terms (they already gave you four)

OpenStudy (anonymous):

ooooh

OpenStudy (anonymous):

okay, it's the first one

OpenStudy (agent0smith):

Then you just add or subtract them all together till you got the sum

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