Question

Which of the following is a one-to-one function?

A. f(x) = {2;0≤x<2 3;2≤x<4 4;4≤x<6
B. {4x+1;x<-2 x-5;x≥-2
C. [[2x]]
D. x^2

Answer 1

The answer would be B

Explanation:

Answer 2

One-to-one function: is a function in which no two elements of the domain A have the same image. In other words, f is a one-to-one function if f(x1) = f(x2) implies x1 = x2.