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Advanced Problem Solving Module 17

First Order Differential Equations
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First Order Differential Equations

In STEP and other advanced mathematics examinations, two main methods are used to solve first order differential equations: separation of variables and the method of integrating factors. This article reviews how the two work.
Second Order Differential Equations
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Second Order Differential Equations

Many modelling situations force us to deal with second order differential equations. In STEP and other advanced mathematics examinations a particular set of second order differential equations arise, and this article covers how to solve them.
It's only a minus sign
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It's only a minus sign

Age
16 to 18
Challenge level
filled star filled star empty star
Solve these differential equations to see how a minus sign can change the answer