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p\303\245 ligningssystem, hvor der er netop \303\251n l\303\270sning.Metode 1 (brug af vektorregning):LUklbXJvd0c2Iy9JK21vZHVsZW5hbWVHNiJJLFR5cGVzZXR0aW5nR0koX3N5c2xpYkdGJzYkLUkjbWlHRiQ2JVEocmVzdGFydEYnLyUnaXRhbGljR1EldHJ1ZUYnLyUsbWF0aHZhcmlhbnRHUSdpdGFsaWNGJy1JI21vR0YkNi1RIjtGJy9GM1Enbm9ybWFsRicvJSZmZW5jZUdRJmZhbHNlRicvJSpzZXBhcmF0b3JHRjEvJSlzdHJldGNoeUdGPS8lKnN5bW1ldHJpY0dGPS8lKGxhcmdlb3BHRj0vJS5tb3ZhYmxlbGltaXRzR0Y9LyUnYWNjZW50R0Y9LyUnbHNwYWNlR1EmMC4wZW1GJy8lJ3JzcGFjZUdRLDAuMjc3Nzc3OGVtRic=QyQtSSV3aXRoRzYiNiNJJ1Zla3RvckdGJSIiIg==Koefficienterne til x kaldes 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2 (brug af solve):QyQtSSZzb2x2ZUc2JCUqcHJvdGVjdGVkR0koX3N5c2xpYkc2IjYjPCQvLCZJInhHRighIiRJInlHRigiIigiIiovLCZGLSIiI0YvIiIkIiImIiIiQyQtSSdmc29sdmVHNiI2IzwkLywmSSJ4R0YlISIkSSJ5R0YlIiIoIiIqLywmRioiIiNGLCIiJCIiJiIiIg==Dvs. l\303\270sning bliver 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matricer):QyQ+SSJBRzYiLUknTWF0cml4R0YlNiMvSSQlaWRHRiUiKiUzKDNfIiIiIg==QyQ+SSJCRzYiLSZJJ1ZlY3Rvckc2JCUqcHJvdGVjdGVkR0koX3N5c2xpYkdGJTYjSSdjb2x1bW5HRiU2Iy9JJCVpZEdGJSIqd3MzXyIiIiI=A's inverse matrix beregnes:QyQqJEkiQUc2IiEiIiIiIg==QyQtSTBkZWxheURvdFByb2R1Y3RHNiQlKnByb3RlY3RlZEcvSSttb2R1bGVuYW1lRzYiSSxUeXBlc2V0dGluZ0c2JEYmSShfc3lzbGliR0YpNiQqJEkiQUdGKSEiIkYvIiIiGiver alts\303\245 enhedsmatricen!L\303\270sningen bestemmes s\303\245ledes:QyQtSTBkZWxheURvdFByb2R1Y3RHNiQlKnByb3RlY3RlZEcvSSttb2R1bGVuYW1lRzYiSSxUeXBlc2V0dGluZ0c2JEYmSShfc3lzbGliR0YpNiQqJEkiQUdGKSEiIkkiQkdGKSIiIg==Dvs. l\303\270sning bliver 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 4 (brug af determinater):Kaldes Carlsberg-formlen ("Carlsberg brygger aldrig cognac, altid bajer, altid bajer").Generaliseringen kaldes Cramers Formel:http://en.wikipedia.org/wiki/Cramer's_rulehttp://www.farmerhe.dk/Skole/Cramers_Regl.pdfQyQtSSV3aXRoRzYkJSpwcm90ZWN0ZWRHSShfc3lzbGliRzYiNiNJLkxpbmVhckFsZ2VicmFHNiRGJ0YmIiIiQyQ+NiRJInhHNiJJInlHRiY2JComLUksRGV0ZXJtaW5hbnRHRiY2Iy1JJ01hdHJpeEc2JCUqcHJvdGVjdGVkR0koX3N5c2xpYkdGJjYjL0kkJWlkR0YmIipXJyozXyIiIiItRis2Iy1GLjYjL0Y0IiozKCozXyIhIiIqJi1GKzYjLUYuNiMvRjQiKnMoKjNfIkY2RjdGPUY2Dvs. l\303\270sning bliver 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