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OpenStudy (anonymous):
Someone help me with the formula please and thanks. Find the 7th term of the geometric sequence a3=128, r=-1/4
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OpenStudy (anonymous):
I need help with writing the formula
OpenStudy (anonymous):
i thought you said check work?
OpenStudy (anonymous):
That was before I found out my formula was wrong I just need help that
OpenStudy (anonymous):
@Austin6i6
OpenStudy (anonymous):
\[n=a^{1}\left(1- r ^{n} \right)\\] over 1-r
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