Let f [2, oo) to R be the funtion defi...

Let `f [2, oo) to R` be the funtion defined by `f (x) = x ^(2) - 4x + 5.` Then the range of f is ________.

A

`[1,oo)`

B

`[4,oo)`

C

`R`

D

`[5, oo)`

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