Let a =2 i - j +2 k and b = i +2 j - k .r Let a vector v be in the plane containing a and b . If v is...

Question

Let a =2 i - j +2 k and b = i +2 j - k .r Let a vector v be in the plane containing a and b . If v is perpendicular to the vector 3 i +2 j - k and its projection on a is 19 units, then |2 v |^2 is equal to _____.

Accepted Answer

1494

JEE Main 2021 Mathematics question

Solution