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Let f : [2, oo) rarr R be the function d...

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

A

1)R

B

2)`[1, oo)`

C

3)`[4, oo)`

D

4)`[5, oo)`

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B
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