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Mathematics 19 Online
OpenStudy (anonymous):

Please help! A geometric series has a sum of 9,837. The common ratio is 3 and the first term is 9. How many terms are in the series?

OpenStudy (anonymous):

Use the formula I have given to u

OpenStudy (anonymous):

Your last response didn't show up :/

OpenStudy (anonymous):

9837=a(r^(n)-1)/n-1

OpenStudy (anonymous):

plug r=3 and a=9 to get n

OpenStudy (anonymous):

sorry r-1 in the denominator

OpenStudy (anonymous):

see, my brain isnot working

OpenStudy (anonymous):

Thanks! :D

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