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Terry D. Destefano's profile - activity

2017-02-23 15:32:29 +0100 received badge  Editor (source)
2017-02-23 15:32:07 +0100 answered a question Linear Algebra Conditions

http://domyhomeworkfor.me/ told me this can easily be done with determinants. If a square matrix's determinant does not equal zero, then that square matrix will have an inverse hence having a unique solution. Since this is a 2x2 matrix, just compute the determinant with the condition that it cannot equal zero: (1)(2)-(2ab) =/= 0 2 =/= 2ab 1=/= ab

2017-02-15 13:26:23 +0100 asked a question Linear Algebra Conditions

imgur.com/a/xIydC The answers is b) ab≠1, but I have no clue how to get to that answer... Can someone help me? :D