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Which of the following functions is inje...

Which of the following functions is injective ?

A

`f(x)=x^(2)+3, x in (-oo, oo)`

B

`f(x)=|x+1|, x in [2, oo)`

C

`f(x)=(x-4)(x-5), x in (oo, 5]`

D

`f(x)=(4x^(2)+3x-5)/(4+3x+5x^(2)), x in (-oo, oo)`

Text Solution

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The correct Answer is:
B
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