the vector joining the pointsA(1,1,-1)andB(2,-3,4) & pointing from a A toB is
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the required vector= (2-1)i+(-3-1)j+(4+1)k
=i-4j+5k
=i-4j+5k
hirabhumihar:
any formula
a vector-b vector=(a1-a2)i+(b1-b2)j+(c1-c2)k
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