Question

Let the function f:[0,1]→R be defined by f(x) = 4^x/(4^x + 2) 

Then the value of f(1/40) + f(2/40) + f(3/40) + ... + f(39/40) - f(1/2) is ___

Answer 1

= 19 + f(1/2) - f(1/2) = 19