Let a = i + 3 j - k , b = 3 i - j + 4 k and c = i + 2 j - 2 k where , R, be three vectors. If the projection of a on c is 10/3 and b c = -6 i + 10 j + 7 k , then the value of + is equal to :

JEE Main 2022 Mathematics question

Let , and where , R, be three vectors. If the projection of on is 10/3 and , then the value of is equal to :

Answer: (1)

The projection of on is + 2)/3 = 10/3, so . Also , , $4)

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Question ID VK-035320