# Answer to Question #3934 in Calculus for pure

Question #3934

Sum the series : -

1- ∑ ( -1/5)^k from ( k = 0 to infinty )

2- ∑ ( 3^k - 5^ k ) / 7^k from ( k=1 to infinity )

3- ∑ ( 1/ k+1 ) from ( k=1 to infinity

1- ∑ ( -1/5)^k from ( k = 0 to infinty )

2- ∑ ( 3^k - 5^ k ) / 7^k from ( k=1 to infinity )

3- ∑ ( 1/ k+1 ) from ( k=1 to infinity

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