Explain Onto function

Explain Onto function R II sin an functieY' but R R dctin•Nf is Range or f I— l. I I e..-doma.n In to that a furXtionf: A —9 R is Onto wc Stan My y e B and try to A such that fu) y, fis said to one-to-one if it not take same value two disurxt points in its For example, O tbcn going tan a k. = l. Note that a function f: R R cannot also a as + = fix ) for some T 0. In or&r to show that a function f: A B is one-to-one. we may take my x, y e .4 such that fix) and try to If MA i m M B) = mm S n). then of injec•

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