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Which of the following functions is not ...

Which of the following functions is not onto ?

A

`f:RtoR,f(x)=3x+5`

B

`f:RtoR^(+),f(x)=x^(2)+4`

C

`f:R^(+)toR^(+),f(x)=sqrt(x)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
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