FP2.4.2 - First order linear differential

First order linear differential The integrating factor e ∫Pdx may be quoted without proof. dy equations of the form + Py = Q dx where P and Q are functions of x.

Use fp2.4.2 - first order linear differential to connect the rule to the data and decision in the question.

This matters because fp2.4.2 - first order linear differential determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply fp2.4.2 - first order linear differential to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: FP2.4.2 - First order linear differential is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.