If the domain of the function f(x)=x^(2)...

If the domain of the function `f(x)=x^(2)-6x+7` is `(-oo, oo)`, then the range of function is

A

`(-oo, oo)`

B

`[-2, oo)`

C

`(-2, 3)`

D

`(-oo, -2)`

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The correct Answer is:

B

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