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[" 12.Let "vec a=hat i+4hat j+2hat k,vec...

[" 12.Let "vec a=hat i+4hat j+2hat k,vec b=3hat i-2hat j+7hat k" and "vec c=2hat i-hat j+4hat k." Find a vector "vec d],[" which is perpendicular to both "vec a" and "vec b," and "vec c*vec d=15]

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Let vec a=hat i+4hat j+2hat k,vec b=3hat i-2hat j+7hat k and vec c=2hat i-hat j+4hat k. Find a vector vec d which is perpendicular to both vec a and vec b and vec c*vec d=18 .

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