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If phi(x)=x^2+4x+5 where x in R, then th...

If `phi(x)=x^2+4x+5` where `x in R`, then the range of the function `phi ` is given by

A

`phi(x)le1`

B

`phi(x)ge1`

C

`-1 lephi(x)le1`

D

none of these.

Text Solution

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The correct Answer is:
B
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