Solving Differential Equations by Separation of Variables

Separate and integrate simple differential equations of the form dy/dx = f(x), such as dy/dx = 4x, to find a general solution.

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Learning objective overview

Master Teaching Guide coverage for this objective.

Current NZC (2007)
  • No direct alignment recorded
New NZC (2026)
  • NZC26-P4-ALG-ER-K-Y9-04

Resources

Terminology

  • Differential equation
  • Separation of variables
  • General solution
  • Particular solution
  • Constant of integration
  • Initial condition
  • Rate of change

Task goals

  • Foundation: Separate and integrate simple differential equations of the form dy/dx = f(x), such as dy/dx = 4x, to find a general solution.
  • Proficient: Separate variables in equations of the form dy/dx = ky or dy/dx = f(x)g(y), integrate both sides, and use a given initial condition to find the particular solution.
  • Excellence: Form and solve a differential equation from a real-world growth/decay or rate-of-change context, then interpret the solution to answer a question about the situation.

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Solving Differential Equations by Separation of Variables

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