Differential Equations: Second Order

15 new tutorials covering second order differential equations are now up! They cover a few important things about the characteristic equation, as well as reduction of order method, undetermined coefficients methods, and variation of parameters. 
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• Characteristic equation and general solution of a linear second order DE 
• Characteristic equation example #1: real distinct roots
• Characteristic equation example #2: real repeated roots
• Characteristic equation example #3: complex roots
• Fundamental solution set and wronskian
• Reduction of order method
• Reduction of order example
• Undetermined coefficients method
• Undetermined coefficients example #1
• Undetermined coefficients example #2
• Undetermined coefficients example #3
• Variation of parameters method
• Variation of parameters example #1
• Variation of parameters example #2
• Variation of parameters example #3

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