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OpenStudy (twalt13):
Help solve please. Write the sum using summation notation, assuming the suggested pattern continues.1 - 3 + 9 - 27 + ...
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OpenStudy (anonymous):
i think this is correct
OpenStudy (anonymous):
\[\sum_{n=0}^{\infty} (-3)^{n}\]
OpenStudy (twalt13):
\[\sum_{n=0}^{\infty}1(-3)^{n}\]
OpenStudy (anonymous):
that 1 is irrelevant because \[1*n=n\]
OpenStudy (twalt13):
okay thanks
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