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JEE Mains · Maths · STD 12 - 6. Application of derivatives

यदि वक्र \(y =a x ^{2}+ bx + c , x \in R\), बिन्दु \((1,2)\) से होकर जाता है तथा मूल बिन्दु पर इसकी स्पर्श रेखा, \(y = x\) है, तो \(a , b , c\) के संभावित मान है

  1. A \(a =\frac{1}{2}, b =\frac{1}{2}, c =1\)
  2. B \(a =1, b =0, c =1\)
  3. C \(a =1, b =1, c =0\)
  4. D \(a =-1, b =1, c =1\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(a =1, b =1, c =0\)

Step-by-step Solution

Detailed explanation

\(a+b+c=2\) and \(\left.\frac{ dy }{ dx }\right|_{(0,0)}=1\) \(2 a x+\left.b\right|_{(0,0)}=1\) \(b =1\) Curve passes through origin So, \(c=0\) and \(a=1\)
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