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Let u and v be vectors in R3. If u x v = 0, then either u = 0 or v = 0.
(b) Let u,v and w be vectors in R . Then (u . v) x w = u . (vxw)
(c) Let A and B be square matrices. If AB = AC, then B = C.
A linear system of 3 equations in 4 unknowns never has any solutions as
there are insufficient equations.
If a system of linear equations has two different solutions, it must have
infinitely many solutions.
Let A =
The vector
is in the null space of A.
If A and B are n x n matrices, then (AB)" = A" BT.
If A is a 3 x 3 matrix, then det (3A) = 3 det (A).
is an eigenvector of
The set

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Subject: Calculus, Math

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