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

यदि समीकरण \(x^{2}+2 x+3=0\) तथा \(a x^{2}+b x+c=0, a, b, c \in R\), के पास उभयनिष्ठ मूल है तो \(a: b: c\) है.

  1. A \(1:2:3\)
  2. B \(3:2:1\)
  3. C \(1:3:2\)
  4. D \(3:1:2\)
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Answer & Solution

Correct Answer

(A) \(1:2:3\)

Step-by-step Solution

Detailed explanation

\(x^{2}+2 x+3=0..........(i)\) \(a x^{2}+b x+c=0..........(ii)\) Since equation \((i)\) has imaginary roots So equation \((ii)\) will also have both roots same as \((i)\). Thus \(\frac{a}{1}=\frac{b}{2}=\frac{c}{3}\) \(\Rightarrow \quad a=\lambda, b=2 \lambda, c=3 \lambda\)…
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