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OpenStudy (konradzuse):
True or false.. The series diverges
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OpenStudy (konradzuse):
\[\sum_{n=1}^{\infty} \frac{(-1)^n}{9^n}\]
OpenStudy (konradzuse):
imo this is an alternating series...
OpenStudy (konradzuse):
it says that if a^n+1 <= a^n it converges.. so in this case a = 1/9 so a^n+1 = 1/81 so a^n+1< a?
OpenStudy (experimentx):
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