If →a,→b and →c are unit vectors, then the value of |→a−→b|2+|→b−→c|2+|→c−→a|2 does not exceed

If →a,→b and →c are unit vectors, then the value of |→a−→b

1.	If →a,→b and →c are unit vectors, then the value of \|→a−→b\|2+\|→b−→c\|2+\|→c−→a\|2 does not exceed
Answer» If $\to a, \to b$ and $\to c$ are unit vectors, then the value of $\| \to a - \to b \|^{2} + \| \to b - \to c \|^{2} + \| \to c - \to a \|^{2}$ does not exceed