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asked ago in Mathematics by (31.8k points)

Let vector a = i + j + √2k, vector b = b1i + b2j + √2k and vector c = 5i + j + √2k be three vectors such that the projection vector of vector b on vector a is vector a. If vector a + vector b  is perpendicular to vector c, then |vector b| is equal to : 

(1) √32 

(2) 6 

(3) √22 

(4) 4

1 Answer

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answered ago by (52.3k points)
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Best answer

The correct option (2) 6   

Explanation:

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