If a, b and c are unit vectors, then \[|\mathbf{a}-\mathbf{b}{{|}^{2}}+|\mathbf{b}-\mathbf{c}{{|}^{2}}+|\mathbf{c}-\mathbf{a}{{|}^{2}}\]does not exceed [IIT Screening 2001]

If a, b and c are unit vectors, then \[|\mathbf{a}-\mathbf{b}{{|}^{2}}

1.	If a, b and c are unit vectors, then \[\|\mathbf{a}-\mathbf{b}{{\|}^{2}}+\|\mathbf{b}-\mathbf{c}{{\|}^{2}}+\|\mathbf{c}-\mathbf{a}{{\|}^{2}}\]does not exceed [IIT Screening 2001]
A.	4
B.	9
C.	8
D.	6
Answer» C. 8

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If a, b and c are unit vectors, then \[|\mathbf{a}-\mathbf{b}{{|}^{2}}+|\mathbf{b}-\mathbf{c}{{|}^{2}}+|\mathbf{c}-\mathbf{a}{{|}^{2}}\]does not exceed [IIT Screening 2001]

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