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osanseviero
I need to write the series and say which is it's tendency
\[\sum_{n=1}^{infinite}\frac{ 1 }{ 2^{n} }\]
So... 1/2 + 1/4 + 1/8 + 1/16+...
Is this correct? r=0.5 a= 1 \[Sn=\frac{ a }{ 1-r }\] so Sn=1/0.5=2