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Math 2940: Linear Algebra for Engineers
Recitation sections 210, 211, 214
26 August 2011
Concept Questions:
1)
What is a linear combination?
2)
How do you multiply a matrix by a vector? (ie, Ax)
3)
How you multiply a vector times a matrix? (ie, xA)
4)
What are all possible linear combinations of (1,0,3) and (-2,0,-6)?

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**Unformatted text preview: **Practice Problems: 5) F is a 3x3 forward difference matrix: F = [ − 1 1 − 1 1 − 1 ] If Fz = b, does F-1 , the inverse matrix of F, so that x = F-1 b exist? If so, find it. If not, under what conditions does Fz=b have a solution?...

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