MonotonicityMedium
Question
f(x) > x ; ∀ x ∈ R. then the equation f (f(x)) - x = 0 has -
Options
A.At least one real root
B.More than one real root
C.no real root if f(x) is a polynomial & one real root if f(x) is not a polynomial
D.no real root at all
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