mathematica解微分方程“y''+4y'+2=0”写成DSolve[y''[x]+4 y'[x]+2 y==0,y[x],x]为什么有错误说“无变量”?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 22:04:10
![mathematica解微分方程“y''+4y'+2=0”写成DSolve[y''[x]+4 y'[x]+2 y==0,y[x],x]为什么有错误说“无变量”?](/uploads/image/z/7138371-3-1.jpg?t=mathematica%E8%A7%A3%E5%BE%AE%E5%88%86%E6%96%B9%E7%A8%8B%E2%80%9Cy%27%27%2B4y%27%2B2%3D0%E2%80%9D%E5%86%99%E6%88%90DSolve%5By%27%27%5Bx%5D%2B4+y%27%5Bx%5D%2B2+y%3D%3D0%2Cy%5Bx%5D%2Cx%5D%E4%B8%BA%E4%BB%80%E4%B9%88%E6%9C%89%E9%94%99%E8%AF%AF%E8%AF%B4%E2%80%9C%E6%97%A0%E5%8F%98%E9%87%8F%E2%80%9D%3F)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 22:04:10