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Algèbre linéaire Exemples
[012345678]
Étape 1
Étape 1.1
Swap R2 with R1 to put a nonzero entry at 1,1.
[345012678]
Étape 1.2
Multiply each element of R1 by 13 to make the entry at 1,1 a 1.
Étape 1.2.1
Multiply each element of R1 by 13 to make the entry at 1,1 a 1.
[334353012678]
Étape 1.2.2
Simplifiez R1.
[14353012678]
[14353012678]
Étape 1.3
Perform the row operation R3=R3-6R1 to make the entry at 3,1 a 0.
Étape 1.3.1
Perform the row operation R3=R3-6R1 to make the entry at 3,1 a 0.
[143530126-6⋅17-6(43)8-6(53)]
Étape 1.3.2
Simplifiez R3.
[143530120-1-2]
[143530120-1-2]
Étape 1.4
Perform the row operation R3=R3+R2 to make the entry at 3,2 a 0.
Étape 1.4.1
Perform the row operation R3=R3+R2 to make the entry at 3,2 a 0.
[143530120+0-1+1⋅1-2+1⋅2]
Étape 1.4.2
Simplifiez R3.
[14353012000]
[14353012000]
Étape 1.5
Perform the row operation R1=R1-43R2 to make the entry at 1,2 a 0.
Étape 1.5.1
Perform the row operation R1=R1-43R2 to make the entry at 1,2 a 0.
[1-43⋅043-43⋅153-43⋅2012000]
Étape 1.5.2
Simplifiez R1.
[10-1012000]
[10-1012000]
[10-1012000]
Étape 2
The pivot positions are the locations with the leading 1 in each row. The pivot columns are the columns that have a pivot position.
Pivot Positions: a11 and a22
Pivot Columns: 1 and 2
Étape 3
The rank is the number of pivot columns.
2