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JEE Mains · Maths · STD 12 - 6. Application of derivatives

यदि द्विघातीय समीकण \(\left(m^{2}+1\right) x^{2}-3 x+\left(m^{2}+1\right)^{2}\) \(=0\) में \(m\) इस प्रकार लिया गया है, कि इसके मूलों का योगफल अधिकतम है तो इसके मूलों के घन का निरपेक्ष अन्तर हैं

  1. A \(8\sqrt 3 \)
  2. B \(4\sqrt 3 \)
  3. C \(10\sqrt 5 \)
  4. D \(8\sqrt 5 \)
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Answer & Solution

Correct Answer

(D) \(8\sqrt 5 \)

Step-by-step Solution

Detailed explanation

\(\left(m^{2}+1\right) x^{2}-3 x+(m+1)^{2}=0\) \(\Rightarrow \alpha+\beta=\frac{3}{m^{2}+1}\) \(\alpha \beta=\frac{(m+1)^{2}}{m^{2}+1}\) \(\because \alpha+\beta\) is maximum \(\therefore m^{2}+1\) is minimum \(\Rightarrow \mathrm{m}=0\) \(\therefore \alpha+\beta=3\) and…
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