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

समतल \(x -2 y +2 z -3=0\) के समांतर तथा बिंदु \((1,2,3)\) से इकाई दूरी पर समतलों के समीकरण \(ax + by + cz + d =0\) हैं। यदि \(( b - d )= K ( c - a )\), तो \(K\) का धनात्मक मान है ........ |

  1. A \(4\)
  2. B \(6\)
  3. C \(2\)
  4. D \(1\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(4\)

Step-by-step Solution

Detailed explanation

Let plane is \(x-2 y+2 z+\lambda=0\) distance from \((1,2,3)=1\) \(\Rightarrow \frac{|\lambda+3|}{5}=1 \Rightarrow \lambda=0,-6\) \(\Rightarrow a =1, b =-2, c =2, d =-6\) or \(0\) \(b - d =4\) or \(-2, c - a =1\) \(\Rightarrow k =4\) or \(-2\)
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