MCQ
The value of $\lambda $ for which the vectors $2\lambda i + j - k$ and $2j + k$ are perpendicular, is
- ✓None
- B$-1$
- C$1$
- DAny value
✓
Answer
Correct option: A.
None
a
(a) Since $(2\lambda i + j - k)\,.\,(2j + k) = 1$ for every $\lambda ,$ therefore the vectors will not be perpendicular for any $\lambda .$
(a) Since $(2\lambda i + j - k)\,.\,(2j + k) = 1$ for every $\lambda ,$ therefore the vectors will not be perpendicular for any $\lambda .$
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