Function f: N N , f(x)= l x+1, x is odd x-1, x is even . is defin… - Vidyadip

MCQ

Function $f: N \rightarrow N , f(x)=\left\{\begin{array}{l}x+1, x \text { is odd } \\ x-1, x \text { is even }\end{array}\right.$ is defined then, $f$ is __________ .

A
not one-one and not onto
B
many-one and onto
✓
one-one but not onto
D
one-one and onto

✓

Answer

Correct option: C.

one-one but not onto

C

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