Q.

If e=li+mj+nk is a unit vector then maximum value of 'lm + mn + nl' is____ 

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answer is 1.

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Detailed Solution

l-m2+m-n2+n-l20 2l2+2m2+2n2-2lm-2mn-2nl0 2l2+m2+n2-2lm+mn+nl0 2-2lm+mn+nl0 lm+mn+nl1

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