y’=e的2x-y次方y(0)=0求这个微分方程满足初始条件的特解?
\[ y'(x) = e^{2x} \cdot e^{-y(x)} \]
进一步简化得到:
\[ y'(x) = e^{2x} \cdot e^{-y(x)} \]
将上式两边同时乘以 \( e^y \),得:
\[ e^y \cdot y'(x) = e^{2x + y(x)} \]
令 \( u = e^y \),则:
\[ \frac{du}{dx} = e^y \cdot y' \]
因此原方程变为:
\[ \frac{du}{dx} = e^{2x + y} \]
对两边积分得:
\[ \int du = \int e^{2x + y} dx \]
\[ u = \frac{1}{2} e^{2x} + C \]
带入 \( y(0) = 0 \),得:
\[ e^0 = \frac{1}{2} e^0 + C \]
\[ 1 = \frac{1}{2} + C \]
\[ C = \frac{1}{2} \]
特解为:
\[ e^y = \frac{1}{2} e^{2x} + \frac{1}{2} \]
\[ e^y = \frac{1}{2}(e^{2x} + 1) \]
该微分方程满足初始条件的特解为:
\[ y(x) = \ln\left(\frac{1}{2}(e^{2x} + 1)\right) \]
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