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Mathematics 7 Online
OpenStudy (anonymous):

please help! girl in distress!:(

OpenStudy (a1234):

What's your question?

OpenStudy (anonymous):

what do you need

OpenStudy (anonymous):

What is the ‘r’ value of the following sequence: 6, -18, 54, -162…?

OpenStudy (anonymous):

hello?

OpenStudy (a1234):

R is the ratio between those numbers. Take one number and divide it by the previous number to get the "r" value.

OpenStudy (mathmale):

In other words: The first 2 terms of your sequence are 6, -18. To obtain the 2nd from the 1st, you would have to multiply the first by what number?

OpenStudy (anonymous):

thanks:)

OpenStudy (anonymous):

hey mathmale!

OpenStudy (mathmale):

Lovely: a1234 and I are basically asking you to do the same thing. Mind venturing a guess?

OpenStudy (anonymous):

um.. maybe its 54??

OpenStudy (anonymous):

no? ok then

OpenStudy (mathmale):

Ask yourself: If we take the first term of the sequence (6) and multiply it by your 54, will you get -18? (6)(54) = -18 ??

OpenStudy (mathmale):

Very sorry; I have to get off the internet. Divide -18 by 6; the result will be the correct r.

OpenStudy (anonymous):

3!! omg ur a genius!

OpenStudy (a1234):

That's -3, not 3.

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