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JEE Mains · Maths · STD 11 - 4.2 Quadratic equations and inequations

\(m\) के उन पूर्णांक मानों की संख्या, जिनके लिए समीकरण \(\left(1+ m ^{2}\right) x ^{2}-2(1+3 m ) x +(1+8 m )=0\) के कोई भी वास्तविक मूल नहीं है

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

Answer & Solution

Correct Answer

(A) अनन्त

Step-by-step Solution

Detailed explanation

\(D=4(1+3 m)^{2}-4\left(1+m^{2}\right)(1+8 m)\) \(=4\left(1+9 m^{2}+6 m-1-8 m-m^{2}-8 m^{3}\right)\) \(=-8 m\left(4 m^{2}-4 m+1\right)\) \(=-8 m(2 m-1)^{2}<0\) \(\therefore \) Infinitely many values of \(\mathrm{m}\)
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