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

જો \(y=y(x)\) એ વિકલ સમીકરણ \(\left(1+e^{2 x}\right) \frac{d y}{d x}+2\left(1+y^{2}\right) e^{x}=0\) નો ઉકેલ હોય અને \(y(0)=0\) હોય, તો \(6\left(y^{\prime}(0)+\left(y\left(\log _{e} \sqrt{3}\right)\right)^{2}\right)\dots\dots\dots\)

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

Answer & Solution

Correct Answer

(C) \(-4\)

Step-by-step Solution

Detailed explanation

\(\frac{d y}{1+y^{2}}+\frac{2 e^{x}}{1+e^{2 x}} d x=0\) \(\dots(i)\) on integration \(\tan ^{-1} y+2 \tan ^{-1} e^{x}=c\) \(\because y(0)=0\) so, \(C =\frac{\pi}{2} \Rightarrow \tan ^{-1} y +2 \tan ^{-1} e ^{ x }=\frac{\pi}{4}\) from eq.\((i)\),…
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