Let a r = k ˆ 2 j ˆ i ˆ + + , b r = k ˆ j ˆ 3 – i ˆ 2 + and c r = k ˆ j ˆ – i ˆ + be three given vectors. Let v r be a vector in the plane of a r and b r whose projection on c r is 3 2 . If j ˆ . v r = 7, then ) k ˆ i ˆ ( . v + r is equal to :

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Let a r = k ˆ 2 j ˆ i ˆ + + , b r = k ˆ j ˆ 3 – i ˆ 2 + and c r = k ˆ j ˆ – i ˆ + be three given vectors. Let v r be a vector in the plane of a r and b r whose projection on c r is 3 2 . If j ˆ . v r = 7, then ) k ˆ i ˆ ( . v + r is equal to :

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