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OpenStudy (anonymous):
help please
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OpenStudy (anonymous):
OpenStudy (solomonzelman):
http://www.regentsprep.org/Regents/math/algtrig/ATP2/GeoSeq.htm gives the formulas for the sum of the sequence with number of terms. \(\LARGE\color{blue}{ \bf S_{n}=\frac{ a_1(1-r^{n}) }{1-r } }\)
OpenStudy (anonymous):
i did that and my answer wasn't one of the options?
OpenStudy (solomonzelman):
options . your work and what you got . Please show me both.
OpenStudy (anonymous):
|dw:1400434385160:dw| it works never mind sorry i looked at it wrong
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