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Let R be the set of all real numbers. Th...

Let R be the set of all real numbers. The function `f:Rrarr R` defined by `f(x)=x^(3)-3x^(2)+6x-5` is

A

one - to - one but not onto

B

onto but not one - to - one

C

neither one - to - one nor onto

D

one - to - one and onto

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The correct Answer is:
D
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