Question

Linear Algebra Question

Answer 1

Well for the second one you simply multiply the inverse of S to both sides. And that cancels the S on the left side

Answer 2

Well, there are two parts to this question.
1) Write the inverse matrix for S and
2) Determine if the columns of S are linearly independent.

part (2) is easy to do -- count the pivot positions in the matrix S. If there are three, then it's invertable, if not, then it's not invertable.

Answer 3

wow, ok. This is crazy because the question is in the first chapter of my text! Literally there were two pages about matrices before this!

Answer 4

What text are you using?

Answer 5

introduction to linear algebra. fourth ed. (
strang)

Answer 6

this first section is acually online http://math.mit.edu/linearalgebra/