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D solve working with d solve singular solutions

教程 6 步,在同一个会话中按顺序运行。每一步都在引擎上执行过,下面的输出就是它实际产生的。

第 1 步
DSolve[y'[x] ^ 2 - y'[x] * x + y[x] == 0, y[x], x]
输出
DSolve[Derivative[1][y][x]^2 - x*Derivative[1][y][x] + y[x] == 0, y[x], x]
第 2 步
DSolve[y'[x] ^ 2 - y'[x] * x + y[x] == 0, y, x, IncludeSingularSolutions -> True]
输出
DSolve[Derivative[1][y][x]^2 - x*Derivative[1][y][x] + y[x] == 0, y, x, IncludeSingularSolutions -> True]
第 3 步
Plot[Table[x c - c^2, {c, -10, 10}]//Evaluate, {x, -50, 50}, PlotRange -> All]
输出
-Graphics-
第 4 步
DSolve[y'[x] == y[x] (1 - y[x]), y[x], x]
输出
{{y[x] -> C[1]/E^Integrate[-1 + y[x], x]}}
第 5 步
DSolve[y'[x] == y[x] (1 - y[x]), y, x, IncludeSingularSolutions -> True]
输出
DSolve[Derivative[1][y][x] == (1 - y[x])*y[x], y, x, IncludeSingularSolutions -> True]
第 6 步
Plot[Table[(E^x/E^x + E^c), {c, -10, 10}]//Evaluate, {x, -20, 20}, PlotRange -> All]
输出
-Graphics-

用到的函数

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