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OpenStudy (anonymous):
4.What is the sum of an 8-term geometric sequence if the first term is 10 and the last term is 781,250? i need help findng the common ratio ? please
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OpenStudy (anonymous):
8th term = ar^7 and first term = a r^7 = = ar^7 / a = r^7 = 781250 / 10 = 78125 r = seventh root of 78125 = 5 common ratio = 5
OpenStudy (anonymous):
can you calculate the sum?
OpenStudy (anonymous):
yes i just needed help finding the common ratio, thank you soo much
OpenStudy (anonymous):
yw
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