Question

What is the unit vector along = − j + k ?
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Answer 1

Answer:

A−B=(3i^+2j^)−(2i^+3j^−k^)=i^−j^+k^ . The desired unit vector is thus A−B||A−B||=i^−j^+k^12+12+12√=13√(i^−j^+k^).