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If x,y,z are three real numbers such tha...

If x,y,z are three real numbers such that ` x+ y +z =4 and x^(2) + y^(2) +z^(2) =6` ,then
(1) ` 2/3 le x,y,z le 2` (2) ` 0 le x,y,z le 2`
(3) ` 1 le x,y,z le 3` (4)` 2 le x,y,z le 3`

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