Did i do this matrix transformation right?

mr_coffee

Hello everyone, i don't know if i did this right or not because the answer isn't in the back of the book. Here is what i did:
http://show.imagehosting.us/show/898..._-1_898705.jpg
Thanks!

BerryBoy

I'm afraid you've made a mistake in line 3.

You said that (j) = -w + 2i, because you've used w = (2,-1),
this is actually T(w).

You defined w on the second line as (1,1).

Hope this helps, let me know how you get/got on,
Sam

mr_coffee

ahh thank you!! it worked out now!!