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If x+y+z=5 and xy+yz+zx=3 then least and...

If `x+y+z=5` and `xy+yz+zx=3` then least and largest value of x are:

A

`10/3 ,5`

B

`-1 , 13/3`

C

`17/3 , 7`

D

none of these

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