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If S(n) denotes the sum of first n terms...

If `S_(n)` denotes the sum of first `n` terms of the series `(9*5^(-2))/(1*2)+(13*5^(-3))/(2*3)+(17*5^(-4))/(3*4)+(21*5^(-5))/(4*5)+....` and `T_(r)` denotes the `r^(th)` term of this series,then

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