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Let f(x)=(9^x)/(9^x+3) . Show f(x)+f(1-x...

Let `f(x)=(9^x)/(9^x+3)` . Show `f(x)+f(1-x)=1` and, hence, evaluate. `f(1/(1996))+f(2/(1996))+f(3/(1996))+...+f((1995)/(1996))`

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