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Let f:R rarr R be a function defined as ...

Let `f:R rarr R` be a function defined as `f(x)=(x^(2)-6)/(x^(2)+2)`, then f is

A

one - one but not onto

B

one - one and onto

C

onto but not one - one

D

neither one - one nor onto

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The correct Answer is:
D
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