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MIT 18.06 Linear Algebra, Spring 2010 7 Online
OpenStudy (anonymous):

Why are free variables important?

OpenStudy (anonymous):

With free variables we can find the null space of a matrix A, or that space which is spanned by all x such that Ax = vector 0

OpenStudy (anonymous):

free variables in general are like degrees of freedom. It gives you a feel for how many degrees of freedom are present in the space. (here null space)

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