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OpenStudy (anonymous):
The sum of a geometric series is -1023 and its first term is -3. If the last term is -768, what is the common ratio?
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OpenStudy (anonymous):
use the sum formula of geometric series
OpenStudy (anonymous):
idk it
OpenStudy (anonymous):
\[\sum_{k=0}^{n-1}ar^k = a\frac{1 - r^n}{1 - r}\]
OpenStudy (anonymous):
\[\large Sum = \frac{a(r^n - 1)}{r - 1}\]
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OpenStudy (hba):
WELCOME TO OPEN STUDY
OpenStudy (anonymous):
@hba right lol
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