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Which of the following functions from Z...

Which of the following functions from Z into Z is a bijection?

A

1)`f(x)=x^3`

B

2)`f(x) = x+2`

C

3)`f(x) = 2x + 1`

D

4)`f(x) = x^2+1`

Text Solution

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The correct Answer is:
B
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