Question 74104
If f(x)= x-1/x+1 then f(x)+ f(1/x) =
:
Deal with f(1/x) first, substitute (1/x) for x in f(x) = x - (1/x) + 1:
:
f(1/x) = (1/x) - 1/(1/x) + 1
:
1/(1/x) is equal to x so you have:
f(1/x) = (1/x) - x + 1
:
It wants f(x) + f(1/x); we just found f(1/x) and f(x) was given originally 
so we have
(x - (1/x) + 1) + ((1/x) - x + 1) =
:
Combine like terms
x - x - (1/x) + (1/x) + 1 + 1 = 2 is the solution
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