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Double Composition (Posted on 2019-05-06) Difficulty: 2 of 5
If f(f(x)) = 1 - 1/(x4+2x2+2), then find the value of f(0)

No Solution Yet Submitted by Danish Ahmed Khan    
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Some Thoughts One value | Comment 1 of 2
Knowing that y = 1 / (x^2+1) is a solution to the functional equation, the only reasonable answer is f(0) = 1. But how would we know that all other solutions (which?) have the same function value at 0 ?
  Posted by JLo on 2019-12-22 08:13:07
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