I think i'm lost on a key concept in LA. I was asked a question about what MxN a matrix needed to be in order to follow laws for T(x) = Ax to go from R4 to R5. I was completely lost. I think i'm still not sure what it means to be Rn, and if only speaking of one R is it Rn, and it two it must be Rn and Rm. And, what does Rn by itself indicate, and what do Rn and Rm together in a problem indicate?(adsbygoogle = window.adsbygoogle || []).push({});

If this makes no sense, then please help me to clear up my problem. I just had the Ch1 test for this course and no matter the question, the answers are almost always just to put the second vector into a matrix with the first vector or first matrix and find if there are free variables, or prove consistancy. Beyond that, i'm having a lot of trouble understanding a lot of the terms they throw around in the questions (realm, span, what T(x) really is, etc, etc). I did well in Calculus, but i'm not seeing this as easily.

Thanks for any guidance, and yes, I have read the book, again, and again, and again.

-A

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# Rn Rm

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