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Let f(x)=x^(2)+4x+1, then...

Let `f(x)=x^(2)+4x+1`, then

A

`f(x) gt0` for all x

B

`f(x) gt 1`when `x ge 0`

C

`f(x) ge1` when ` x le -4`

D

`f(x)=f(-x)` for all x

Text Solution

Verified by Experts

The correct Answer is:
C
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