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Function is said to be onto if range is ...

Function is said to be onto if range is same as co - domain otherwise it is into. Function is said to be one - one if for all `x_(1) ne x_(2) rArr f(x_(1)) ne f(x_(2))` otherwise it is many one.
A function `f: [0, oo)` defined as `f(x)=(x)/(1+x)` is

A

one - one and onto

B

one - one but not onto

C

onto but not one - one

D

neither one - one nor onto

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The correct Answer is:
B
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