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

\(\alpha\) के उन सभी संभावित धन पूर्णांक मानों की संख्या जिनके लिए द्विघातीय समीकरण \(6 x ^{2}-11 x +\alpha=0\) के मूल परिमेय संख्याएँ हैं

  1. A \(2\)
  2. B \(5\)
  3. C \(3\)
  4. D \(4\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(3\)

Step-by-step Solution

Detailed explanation

\(D\) must be perfect square \( \Rightarrow 121 - 24\alpha = {\lambda ^2}\) \( \Rightarrow \) maximum value of \(\alpha \) is \(5\) \(\alpha = 1 \Rightarrow \lambda \notin I\) \(\alpha = 2 \Rightarrow \lambda \notin I\) \(\alpha = 3 \Rightarrow \lambda \in I\) \(\Rightarrow\)…
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