\left. \begin{array} { l } { \text { If } a ^ { 2 } + b ^ { 2 } + c ^ – InterviewSolution

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1.	\left. \begin{array} { l } { \text { If } a ^ { 2 } + b ^ { 2 } + c ^ { 2 } = 14 , \text { then } a b + b c + \text { ca is always } } \\ { \text { greater than or equal to } } \\ { \text { (1) } 0 } \\ { ( 3 ) - 1 } \end{array} \right.
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