(Sorry, posting a lot of threads tonight. Exams coming up, past papers are surprisingly unlike my notes ) A = Determine all 2 x 2 matrices B such that AB-BA = I really don't know how to even start this one. Could anybody give any pointers?
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Let Find so that
Originally Posted by Plato Let Find so that Ok, so I've tried to work though it that way but I've hit a snag. Perhaps I've multiplied wrongly? Can you see the error? So, AB - BA : Which leaves the situation of y always having to be one bigger than z, but z always having to equal y, which can't be true?
If you have any hope of passing this test then you better improve basic skills.
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