If x is real and k=(x^2-x+1)/(x2+x+1) , ...

If `x` is real and `k=(x^2-x+1)/(x_2+x+1)` , then `k in [1//3,3]` (b) `kgeq3` (c) `klt=1//3` (d) none of these

A

`1 //3 le k le 3`

B

`k ge 5`

C

`k le 0`

D

none of these

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A

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