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JEE Mains · Maths · STD 12 - 9. differential equations

माना अवकल समीकरण \(\frac{d y}{d x}=x+y\), के \(y _1(0)=0\) तथा \(y _2(0)=1\) के लिए दो भिन्न हल क्रमश: \(y = y _1( x )\) तथा \(y = y _2( x )\) हैं। तब \(y = y _1\) (x) तथा \(y = y _2( x )\) के प्रतिच्छेदन बिंदुओं की संख्या है-

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

Answer & Solution

Correct Answer

(A) \(0\)

Step-by-step Solution

Detailed explanation

\(\frac{d y}{d x}=x+y \Rightarrow \frac{d y}{d x}-y=x\) \(\text { 1f }= e ^{-x}\) \(\therefore\) solution is \(y e^{-x}=\int x e^{-x} d x\) \(y e^{-x}=-x e^{-x}-e^{-x}+c\) \(y=-x-1+c e^{x}\) \(y_{1}(0)=0 \Rightarrow c=1\) \(\therefore y_{1}=-x-1+e^{x}\)…
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