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

यदि दो सरल रेखायें जिनकी दिक्कोज्या संबंध \(1+ m - n =0,31^2+ m ^2+ cnl =0\) द्वारा दी जाती है, समान्तर है, तब \(c\) का धनात्मक मान होगा।

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

Correct Answer

(A) \(6\)

Step-by-step Solution

Detailed explanation

\(1+ m - n =0\) \(3 l^{2}+ m ^{2}+ cl (1+ m )=0\) \(n =1+ m\) \(3 l ^{2}+ m ^{2}+ cl ^{2}+ clm =0\) \((3+ c ) l ^{2}+ clm + m ^{2}=0\) \((3+c)\left(\frac{l}{m}\right)^{2}+c\left(\frac{l}{m}\right)+1=0 \ldots \ldots(1)\) \(\because\) lies are parallel. Roots of \((1)\) must be…
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