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

\(\mathrm{k}(\mathrm{k} \neq 0 )\) ની બધીજ પૂર્ણાંક સંખ્યાનો સરવાળો મેળવો કે જેથી \(x\) નું સમીકરણ \(\frac{2}{x-1}-\frac{1}{x-2}=\frac{2}{k}\) ને એકપણ વાસ્તવિક બીજ ન હોય .

  1. A \(95\)
  2. B \(76\)
  3. C \(66\)
  4. D \(70\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(66\)

Step-by-step Solution

Detailed explanation

\(\frac{2}{x-1}-\frac{1}{x-2}=\frac{2}{k}\) \(x \in R-\{1,2\}\) \(\Rightarrow k(2 x-4-x+1)=2\left(x^{2}-3 x+2\right)\) \(\Rightarrow k(x-3)=2\left(x^{2}-3 x+2\right)\) \(\text { for } x \neq 3, \quad \mathrm{k}=2\left(\mathrm{x}-3+\frac{2}{\mathrm{x}-3}+3\right)\)…
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