matriz inversa

Matriz inversa parte 1

http://www.google.com.ec/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CB8QtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DE0Xr7sTGrHY&ei=IRecUNOjNeS00QH1_4HoBQ&usg=AFQjCNHKGK_yGdJcV8xlalUu5YAidO_syw&sig2=DKoXjc76ydAVCXHGiHI1fw

Matriz inversa parte 2

http://www.google.com.ec/url?sa=t&rct=j&q=&esrc=s&source=video&cd=3&cad=rja&ved=0CDoQtwIwAg&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DtY3v_KlF5nY&ei=1hecUJKALMT30gHq9oCwAg&usg=AFQjCNFrKNroi3j4zlIUZUhOXaaIHUh3dw&sig2=NzAhlatGbbvNxNbITjHKCQ