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Let . k ˆ 2 j ˆ i ˆ 3 b and k ˆ j ˆ i a ,           Let c be a vector such that   . 20 c b and 17 c a , 0 c c b a           Then   2 k ˆ j ˆ i ˆ c     is equal to

1. 46
2. 53
3. 62
4. 49

Correct answer: 46

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