Question

let f be a function from r to r and f is bijective if

Answer 1

Answer:

A function f:A→B is bijective (or f is a bijection) if each b∈B has exactly one preimage. Since "at least one'' + "at most one'' = "exactly one'', f is a bijection if and only if it is both an injection and a surjection. A bijection is also called a one-to-one correspondence.

Explanation:

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