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

સમીકરણ \(x^{2}+(3-a) x+1=2 a\) ના બીજના વર્ગના સરવાળાની ન્યૂનતમ કિમંત મેળવો.

  1. A \(4\)
  2. B \(5\)
  3. C \(6\)
  4. D \(8\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(6\)

Step-by-step Solution

Detailed explanation

\(\alpha^{2}+\beta^{2}=(\alpha+\beta)^{2}-2 \alpha \beta\) let \(f(a)=(3-a)^{2}-2(1-2 a)\) \(f ( a )= a ^{2}-2 a +7\) \(f ( a )=( a -1)^{2}+6\) \(f ( a ))_{\min .}=6\)
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app