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 the function is

A

1) `(-oo, oo)`

B

2) `[-2,oo)`

C

3) `(-2,3)`

D

4) `(-oo,-2)`

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The correct Answer is:

B

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