Recent content by KIDRoach

Just wondering, so my answers in part a and b is wrong then? No one has mentioned it yet so I'm not sure... I know that part b is wrong now, that det(A) = -1 instead of 1 ? Tim, If A is 2x2 and not I or -I, then det(A) = -1 right? I still don't get how to get from that point to the third...

Hi Tim! Thanks for answering my question. I tried that too I think, but I don't think it's right, or at least either that's wrong or one of the earlier answer is wrong. :( I know that det(AB) = det(A) x det(B) = ab When I tried it to solve the equation: \[ \left( \begin{array}{ccc}...

I'm pretty sure both of your answers are correct: {(0,0,1), (0,1,0)} {(0,1,1), (0,0,1)} Both of these sets can be the basis of the space that you are referring to.

Homework Statement a.) If A2 = I, what are the possible eigenvalues of A? b.) If this A is 2 by 2, and not I or -I, find its trace and determinant. c.) If the first row is (3,-1), what is the second row?Homework Equations None was given, but I think: 1. det(A) = 1 for A2 = I or A-1 = A We're...