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A function f(x) is given by f(x) = 5^x \over 5^x + 5, then the sum of the series f\left( 1 \over 20 \right) + f\left( 2 \over 20 \right) + f\left( 3 \over 20 \right) + ....... + f\left( 39 \over 20 \right) is equal to : | Watch the step-by-step video solution for this NIMCET PYQ.