The r^{th}term u_{r}, of a series is given by u_{r}=(1/3)^{2r-2}+ (1/3)^{3r-1}

Express ∑^{n}_{r=1 }u_{r }in the form A(1-B/27^{n}) where A and B are constant.

Find the sum of infinity of the series.

Please help me! Thank you!(Bow)

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- Sep 17th 2012, 08:38 PMAuXianSeries problem
The r

^{th}term u_{r}, of a series is given by u_{r}=(1/3)^{2r-2}+ (1/3)^{3r-1}

Express ∑^{n}_{r=1 }u_{r }in the form A(1-B/27^{n}) where A and B are constant.

Find the sum of infinity of the series.

Please help me! Thank you!(Bow) - Sep 17th 2012, 10:30 PMkalyanramRe: Series problem
- Sep 17th 2012, 11:17 PMAuXianRe: Series problem
Thanks for your solution. It's help me. Thanks!(Wink)