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

यदि समीकरणों \(a x^{2}+ b x+ c =0\), \(( a , b , c \in R , a \neq 0)\) तथा \(2 x^{2}+3 x+4=0\) का एक मूल उभयनिष्ट है, तो \(a: b: c\) बराबर है

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

Answer & Solution

Correct Answer

(B) \(2 :3 : 4\)

Step-by-step Solution

Detailed explanation

Let \(\alpha, \beta\) be the common roots of both the equations. For first equation \(a x^{2}+b x+c=0\) we have \(\alpha+\beta=\frac{-b}{a}..........(1)\) \(\alpha . \beta=\frac{c}{a}..........(2)\) For second equation \(2 x^{2}+3 x+4=0\) we have…
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