Let a = i + 2 j + 3 k , b = 3 i + j - k and c be three vectors such that c is coplanar with a and b . If the...

Question

Let a = i + 2 j + 3 k , b = 3 i + j - k and c be three vectors such that c is coplanar with a and b . If the vector c is perpendicular to b and a . c = 5, then | c | is equal to

Accepted Answer

(4)

JEE Main 2025 Mathematics question

Solution

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