Recent content by Soluz

1) I can assume all these matrices to be 2x2. We have matrix A and B and AB = BA, that is, they commute.. Prove if C = A^2 + 2*A and D = A^3 + 5 * I (I is identity matrix), then CD = DC. Then give a theory that generalizes this. 2) why does R(theta)R(phi)=R(theta+phi)? (explain with...

Homework Statement I'm having some major trouble this these two questions. Sketch the set, s, where s = {z| | z^2 - 1 | < 1 } ... z is a complex number Sketch the set, s, where s = {Z| | Z | > 2 | Z - 1 | } ... Z is a complex number 2. The attempt at a solution This is supposed to...