JEE Main 2026 Mathematics question
Let and . If is a vector such that and , then |3r|² is equal to:
Answer: (A)
Solution
Solving the linear system for r gives , so |3r|² = 44.
Let and . If is a vector such that and , then |3r|² is equal to:
Solving the linear system for r gives , so |3r|² = 44.