June 2019
Beginner
553 pages
17h 41m
English
1. Hint: Can you make up an example of an inconsistent system that is in row echelon form and has free variables?
2. Hint: For a homogeneous system there is always one solution that is very obvious.
3. Hint: See Theorem1.5.2 .
4. The hint for the previous question also applies here.
5. Hint: Try making up some examples to see if this works.
6. Hint: See Exercise22 from Section1.4 .
7. Hint: It should be easy to make up a counterexample for this statement. To see why the formula doesn’t work multiply out the expression
and remember that matrix multiplication is not commutative.
8. Hint: If and A is nonsingular then you should be able to give a one line proof that B must equal C. What about the ...
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