JEE Main 2019 Mathematics question
Let α ∈ R and the three vectors , and . Then the set S = {α : , and are coplanar}
Answer: (D)
Solution
[a b c] = −3α − 18 ≠ 0 for real α.
Let α ∈ R and the three vectors , and . Then the set S = {α : , and are coplanar}
[a b c] = −3α − 18 ≠ 0 for real α.