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If vec a =2 hat i + hat j + 2 hat k, th...

If ` vec a =2 hat i + hat j + 2 hat k`, then the value of `| hat i xx (vac a xx hat i)|^(2) + | hat i xx (vec a xx hat j)|^(2) + |hatk xx (vec a xx hat k)|^(2)` equal to _______

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