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Change of Basis
the most confusing thing in linear algebra (don't @ me)
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Linear Constant Coefficient ODEs
the most important topic in an ODE class
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Integrating Factors Explained
the most common way to solve first order linear ODE's
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Bases for the fundamental spaces of a matrix
a lot of students struggle with this so here. row space, column space, null space, and left null space.
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Series Solutions Done Quick
the fast way to do series solutions. no reindexing required.