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The range of the function f(x)= (x^2-x+1...

The range of the function `f(x)= (x^2-x+1)/(x^2+x+1)` where `x in R`, is

A

`xle0`

B

`1/3lekle3`

C

`kge5`

D

none of these

Text Solution

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The correct Answer is:
B
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