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JEE Mains · Maths · STD 12 - 11. three dimension geometry

माना रेखा \(\frac{x-3}{7}=\frac{y-2}{-1}=\frac{z-3}{-4}\) एक समतल, जिसमें रेखाएँ \(\frac{x-4}{1}=\frac{y+1}{-2}=\frac{z}{1}\) तथा \(4 a x-y+5 z-7 a=0=2 x -5 y - z -3\), \(a \in R\) स्थित हैं, को बिन्दु \(P(\alpha, \beta, \gamma)\) पर काटती है। तब \(\alpha+\beta+\gamma\) का मान \(........\)

  1. A \(13\)
  2. B \(11\)
  3. C \(12\)
  4. D \(10\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(12\)

Step-by-step Solution

Detailed explanation

Equation of plane \(4 a x-y+5 z-7 a+\lambda(2 x -5 y - z -3)=0\) this satisfy \((4,-1,0)\) \(16 a+1-7 a+\lambda(8+5-3)=0\) \(9 a+1+10 \lambda=0\) Normal vector of the plane A is \((4 a+2 \lambda,-1-5 \lambda, 5-\lambda)\) vector along the line which contained the plane \(A\) is…
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