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Instructions.
Interactive decision-tree flowchart for choosing a first-order solution method. Starting from a given differential equation, it asks in order: Is the equation first order? If no, higher-order tools come in later chapters. Is it already a derivative of the form d/dx of something equals f of x? If yes, use direct integration. Is it separable? If yes, use separation of variables. Is it linear? If yes, use the integrating factor method; if no, use qualitative or numerical tools. Yes and No buttons advance the highlighted question and the chosen path is highlighted in green.
