JEE Main 2016 Mathematics question
If the line, lies in the plane, ℓx + my – z = 9, then is equal to :
Answer: (D)
Solution
Direction ⟂ normal: 2ℓ − m − 3 = 0; point (3, −2, −4) on plane: 3ℓ − 2m + 4 = 9. So ℓ = 1, m = −1 and .
If the line, lies in the plane, ℓx + my – z = 9, then is equal to :
Direction ⟂ normal: 2ℓ − m − 3 = 0; point (3, −2, −4) on plane: 3ℓ − 2m + 4 = 9. So ℓ = 1, m = −1 and .