JEE Main · MathematicsEasy
If the vectors and are perpendicular, find the value of .
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: B —
Solution
For perpendicular vectors, the dot product is zero: . This simplifies to $6 - 2a + 4 = 0$, which gives $10 = 2a$, so .
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