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OpenStudy (anonymous):
What is the sum of a 6-term geometric series if the first term is 22 and the last term is 1,299,078?
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OpenStudy (ashleyisakitty):
a =22 & ar^5=1299078 r^5=1299078/22=59049 r=9 S(6)=22(9^6-1)/9-1)=22(531441-1)/8=1461460
OpenStudy (anonymous):
you're awesome
OpenStudy (ashleyisakitty):
:3
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