Let p =2 i +3 j + k and q = i +2 j + k be two vectors. If a vector r =( i + j + k ) is perpendicular to each...

Question

Let p =2 i +3 j + k and q = i +2 j + k be two vectors. If a vector r =( i + j + k ) is perpendicular to each of the vectors ( p + q ) and ( p - q ), and | r |= 3, then | |+| |+| | is equal to ——

Accepted Answer

3

JEE Main 2021 Mathematics question

Solution