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OpenStudy (anonymous):
What is the sum of the geometric sequence 1, 3, 9, … if there are 12 terms? 292,524 265,720 139,968 104,976
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OpenStudy (anonymous):
ooh i like these
OpenStudy (anonymous):
a=1 r*a^0+r*a^1+r*a^2...
OpenStudy (anonymous):
oh wait switch a and r the r has the ^ not the a
Parth (parthkohli):
\[S = {1 - r^n \over 1 - r} \]
OpenStudy (anonymous):
B?
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OpenStudy (anonymous):
265720
OpenStudy (anonymous):
YES :)
OpenStudy (anonymous):
yay!! Thank you :)
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