Answer :

f(x) = x2


y = x2


in this range the lines cut the curve in 2 equal valued points of y, therefore, the function f(x) = x2 is many - one .


Range of f(x) = (0,∞)≠R(codomain)


f(x) is into



f : R R: f(x) = x2 is many - one into

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