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

જો \(\alpha \), \(\beta \) અને \(\gamma \) એ \(G.P.\) ના ક્રમિકપદ છે કે જેથી સમીકરણ \(\alpha x^2 + 2\beta x + \gamma  = 0\) અને \(x^2 + x -1 = 0\) ને સમાન્ય ઉકેલ મળે તો  \(\alpha(\beta  + \gamma )\) ની કિમત મેળવો. 

  1. A \(\alpha \gamma \)
  2. B \(0\)
  3. C \(\alpha \beta \)
  4. D \(\beta \gamma \)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\beta \gamma \)

Step-by-step Solution

Detailed explanation

\(\alpha, \beta, \gamma\) are in \(G.P.\) \(\alpha x^{2}+2 \beta x+\gamma=0\) and \(x^{2}+x-1=0\) have a common roots. Both roots will be common. \(\frac{\alpha}{1}=\frac{2 \beta}{1}=\frac{\gamma}{-1}=\lambda\)…
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