MCQ
The plane $2\text{x}-(1-\lambda)\text{y}+3\lambda\text{z}=0$ passes through the intersection of the planes:
  • 2x - y = 0 and y- 3z = 0
  • B
    2x + 3z = 0 and y = 0
  • C
    2x - y + 3z = 0 and y - 3z = 0
  • D
    None of these

Answer

Correct option: A.
2x - y = 0 and y- 3z = 0
The given plane is

$2\text{x}-(1-\lambda)\text{y}+3\lambda\text{z}=0$

$\Rightarrow(2\text{x}-\text{y})+\lambda(-\text{y}+3\text{z})=0$

So, this plane passes through the intersection of the planes

2x - y = 0 and -y + 3z = 0

⇒ 2x - y = 0 and y - 3z = 0.

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