Which of the following functions from Z into Z are bijective?
A. f(x) = x3
B. f(x) = x + 2
C. f(x) = 2x + 1
D. f(x) = x2 + 1
Answer:B
Which of the following functions from Z into Z are bijective?
A. f(x) = x3 B. f(x) = x + 2 C. f(x) = 2x + 1 D. f(x) = x2 + 1