Express the series using sigma notation. 2 - 6 + 18 – 54 + 162 ...

Mathematics

1 answer:

lidiya [134]3 years ago

6 0

$2-6+18-54+162+\cdots=2(-3)^0+2(-3)^1+2(-3)^2+2(-3)^3+2(-3)^4+\cdots$
$=\displaystyle2\sum_{n=0}^\infty(-3)^n$

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Question from Amanda, a parent:

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