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Algèbre linéaire Exemples
[63-3645-2754-8154-6345-72-3663-5472-4545-1845-93627-54-54-6336-27-4518-3681-6345727227]⎡⎢
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⎢⎣63−3645−2754−8154−6345−72−3663−5472−4545−1845−93627−54−54−6336−27−4518−3681−6345727227⎤⎥
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Étape 1
Write as an augmented matrix for Ax=0.
[63-3645-27540-8154-6345-720-3663-5472-45045-1845-936027-54-54-63360-27-4518-36810-63457272270]
Étape 2
Étape 2.1
Multiply each element of R1 by 163 to make the entry at 1,1 a 1.
Étape 2.1.1
Multiply each element of R1 by 163 to make the entry at 1,1 a 1.
[6363-36634563-27635463063-8154-6345-720-3663-5472-45045-1845-936027-54-54-63360-27-4518-36810-63457272270]
Étape 2.1.2
Simplifiez R1.
[1-4757-37670-8154-6345-720-3663-5472-45045-1845-936027-54-54-63360-27-4518-36810-63457272270]
[1-4757-37670-8154-6345-720-3663-5472-45045-1845-936027-54-54-63360-27-4518-36810-63457272270]
Étape 2.2
Perform the row operation R2=R2+81R1 to make the entry at 2,1 a 0.
Étape 2.2.1
Perform the row operation R2=R2+81R1 to make the entry at 2,1 a 0.
[1-4757-37670-81+81⋅154+81(-47)-63+81(57)45+81(-37)-72+81(67)0+81⋅0-3663-5472-45045-1845-936027-54-54-63360-27-4518-36810-63457272270]
Étape 2.2.2
Simplifiez R2.
[1-4757-376700547-367727-1870-3663-5472-45045-1845-936027-54-54-63360-27-4518-36810-63457272270]
[1-4757-376700547-367727-1870-3663-5472-45045-1845-936027-54-54-63360-27-4518-36810-63457272270]
Étape 2.3
Perform the row operation R3=R3+36R1 to make the entry at 3,1 a 0.
Étape 2.3.1
Perform the row operation R3=R3+36R1 to make the entry at 3,1 a 0.
[1-4757-376700547-367727-1870-36+36⋅163+36(-47)-54+36(57)72+36(-37)-45+36(67)0+36⋅045-1845-936027-54-54-63360-27-4518-36810-63457272270]
Étape 2.3.2
Simplifiez R3.
[1-4757-376700547-367727-187002977-19873967-997045-1845-936027-54-54-63360-27-4518-36810-63457272270]
[1-4757-376700547-367727-187002977-19873967-997045-1845-936027-54-54-63360-27-4518-36810-63457272270]
Étape 2.4
Perform the row operation R4=R4-45R1 to make the entry at 4,1 a 0.
Étape 2.4.1
Perform the row operation R4=R4-45R1 to make the entry at 4,1 a 0.
[1-4757-376700547-367727-187002977-19873967-997045-45⋅1-18-45(-47)45-45(57)-9-45(-37)36-45(67)0-45⋅027-54-54-63360-27-4518-36810-63457272270]
Étape 2.4.2
Simplifiez R4.
[1-4757-376700547-367727-187002977-19873967-99700547907727-187027-54-54-63360-27-4518-36810-63457272270]
[1-4757-376700547-367727-187002977-19873967-99700547907727-187027-54-54-63360-27-4518-36810-63457272270]
Étape 2.5
Perform the row operation R5=R5-27R1 to make the entry at 5,1 a 0.
Étape 2.5.1
Perform the row operation R5=R5-27R1 to make the entry at 5,1 a 0.
[1-4757-376700547-367727-187002977-19873967-99700547907727-187027-27⋅1-54-27(-47)-54-27(57)-63-27(-37)36-27(67)0-27⋅0-27-4518-36810-63457272270]
Étape 2.5.2
Simplifiez R5.
[1-4757-376700547-367727-187002977-19873967-99700547907727-18700-2707-5137-36079070-27-4518-36810-63457272270]
[1-4757-376700547-367727-187002977-19873967-99700547907727-18700-2707-5137-36079070-27-4518-36810-63457272270]
Étape 2.6
Perform the row operation R6=R6+27R1 to make the entry at 6,1 a 0.
Étape 2.6.1
Perform the row operation R6=R6+27R1 to make the entry at 6,1 a 0.
[1-4757-376700547-367727-187002977-19873967-99700547907727-18700-2707-5137-36079070-27+27⋅1-45+27(-47)18+27(57)-36+27(-37)81+27(67)0+27⋅0-63457272270]
Étape 2.6.2
Simplifiez R6.
[1-4757-376700547-367727-187002977-19873967-99700547907727-18700-2707-5137-360790700-42372617-333772970-63457272270]
[1-4757-376700547-367727-187002977-19873967-99700547907727-18700-2707-5137-360790700-42372617-333772970-63457272270]
Étape 2.7
Perform the row operation R7=R7+63R1 to make the entry at 7,1 a 0.
Étape 2.7.1
Perform the row operation R7=R7+63R1 to make the entry at 7,1 a 0.
[1-4757-376700547-367727-187002977-19873967-99700547907727-18700-2707-5137-360790700-42372617-333772970-63+63⋅145+63(-47)72+63(57)72+63(-37)27+63(67)0+63⋅0]
Étape 2.7.2
Simplifiez R7.
[1-4757-376700547-367727-187002977-19873967-99700547907727-18700-2707-5137-360790700-42372617-3337729700911745810]
[1-4757-376700547-367727-187002977-19873967-99700547907727-18700-2707-5137-360790700-42372617-3337729700911745810]
Étape 2.8
Multiply each element of R2 by 754 to make the entry at 2,2 a 1.
Étape 2.8.1
Multiply each element of R2 by 754 to make the entry at 2,2 a 1.
[1-4757-37670754⋅0754⋅547754(-367)754⋅727754(-187)754⋅002977-19873967-99700547907727-18700-2707-5137-360790700-42372617-3337729700911745810]
Étape 2.8.2
Simplifiez R2.
[1-4757-3767001-2343-13002977-19873967-99700547907727-18700-2707-5137-360790700-42372617-3337729700911745810]
[1-4757-3767001-2343-13002977-19873967-99700547907727-18700-2707-5137-360790700-42372617-3337729700911745810]
Étape 2.9
Perform the row operation R3=R3-2977R2 to make the entry at 3,2 a 0.
Étape 2.9.1
Perform the row operation R3=R3-2977R2 to make the entry at 3,2 a 0.
[1-4757-3767001-2343-1300-2977⋅02977-2977⋅1-1987-2977(-23)3967-2977⋅43-997-2977(-13)0-2977⋅00547907727-18700-2707-5137-360790700-42372617-3337729700911745810]
Étape 2.9.2
Simplifiez R3.
[1-4757-3767001-2343-1300000000547907727-18700-2707-5137-360790700-42372617-3337729700911745810]
[1-4757-3767001-2343-1300000000547907727-18700-2707-5137-360790700-42372617-3337729700911745810]
Étape 2.10
Perform the row operation R4=R4-547R2 to make the entry at 4,2 a 0.
Étape 2.10.1
Perform the row operation R4=R4-547R2 to make the entry at 4,2 a 0.
[1-4757-3767001-2343-1300000000-547⋅0547-547⋅1907-547(-23)727-547⋅43-187-547(-13)0-547⋅00-2707-5137-360790700-42372617-3337729700911745810]
Étape 2.10.2
Simplifiez R4.
[1-4757-3767001-2343-13000000000180000-2707-5137-360790700-42372617-3337729700911745810]
[1-4757-3767001-2343-13000000000180000-2707-5137-360790700-42372617-3337729700911745810]
Étape 2.11
Perform the row operation R5=R5+2707R2 to make the entry at 5,2 a 0.
Étape 2.11.1
Perform the row operation R5=R5+2707R2 to make the entry at 5,2 a 0.
[1-4757-3767001-2343-13000000000180000+2707⋅0-2707+2707⋅1-5137+2707(-23)-3607+2707⋅43907+2707(-13)0+2707⋅00-42372617-3337729700911745810]
Étape 2.11.2
Simplifiez R5.
[1-4757-3767001-2343-130000000001800000-990000-42372617-3337729700911745810]
[1-4757-3767001-2343-130000000001800000-990000-42372617-3337729700911745810]
Étape 2.12
Perform the row operation R6=R6+4237R2 to make the entry at 6,2 a 0.
Étape 2.12.1
Perform the row operation R6=R6+4237R2 to make the entry at 6,2 a 0.
[1-4757-3767001-2343-130000000001800000-990000+4237⋅0-4237+4237⋅12617+4237(-23)-3337+4237⋅437297+4237(-13)0+4237⋅00911745810]
Étape 2.12.2
Simplifiez R6.
[1-4757-3767001-2343-130000000001800000-9900000-3338400911745810]
[1-4757-3767001-2343-130000000001800000-9900000-3338400911745810]
Étape 2.13
Perform the row operation R7=R7-9R2 to make the entry at 7,2 a 0.
Étape 2.13.1
Perform the row operation R7=R7-9R2 to make the entry at 7,2 a 0.
[1-4757-3767001-2343-130000000001800000-9900000-3338400-9⋅09-9⋅1117-9(-23)45-9(43)81-9(-13)0-9⋅0]
Étape 2.13.2
Simplifiez R7.
[1-4757-3767001-2343-130000000001800000-9900000-3338400012333840]
[1-4757-3767001-2343-130000000001800000-9900000-3338400012333840]
Étape 2.14
Swap R4 with R3 to put a nonzero entry at 3,3.
[1-4757-3767001-2343-130001800000000000-9900000-3338400012333840]
Étape 2.15
Multiply each element of R3 by 118 to make the entry at 3,3 a 1.
Étape 2.15.1
Multiply each element of R3 by 118 to make the entry at 3,3 a 1.
[1-4757-3767001-2343-130018018181801801801800000000-9900000-3338400012333840]
Étape 2.15.2
Simplifiez R3.
[1-4757-3767001-2343-13000100000000000-9900000-3338400012333840]
[1-4757-3767001-2343-13000100000000000-9900000-3338400012333840]
Étape 2.16
Perform the row operation R5=R5+99R3 to make the entry at 5,3 a 0.
Étape 2.16.1
Perform the row operation R5=R5+99R3 to make the entry at 5,3 a 0.
[1-4757-3767001-2343-1300010000000000+99⋅00+99⋅0-99+99⋅10+99⋅00+99⋅00+99⋅000-3338400012333840]
Étape 2.16.2
Simplifiez R5.
[1-4757-3767001-2343-13000100000000000000000-3338400012333840]
[1-4757-3767001-2343-13000100000000000000000-3338400012333840]
Étape 2.17
Perform the row operation R6=R6+3R3 to make the entry at 6,3 a 0.
Étape 2.17.1
Perform the row operation R6=R6+3R3 to make the entry at 6,3 a 0.
[1-4757-3767001-2343-1300010000000000000000+3⋅00+3⋅0-3+3⋅133+3⋅084+3⋅00+3⋅00012333840]
Étape 2.17.2
Simplifiez R6.
[1-4757-3767001-2343-130001000000000000000000338400012333840]
[1-4757-3767001-2343-130001000000000000000000338400012333840]
Étape 2.18
Perform the row operation R7=R7-123R3 to make the entry at 7,3 a 0.
Étape 2.18.1
Perform the row operation R7=R7-123R3 to make the entry at 7,3 a 0.
[1-4757-3767001-2343-130001000000000000000000338400-123⋅00-123⋅0123-123⋅133-123⋅084-123⋅00-123⋅0]
Étape 2.18.2
Simplifiez R7.
[1-4757-3767001-2343-1300010000000000000000003384000033840]
[1-4757-3767001-2343-1300010000000000000000003384000033840]
Étape 2.19
Swap R6 with R4 to put a nonzero entry at 4,4.
[1-4757-3767001-2343-1300010000003384000000000000000033840]
Étape 2.20
Multiply each element of R4 by 133 to make the entry at 4,4 a 1.
Étape 2.20.1
Multiply each element of R4 by 133 to make the entry at 4,4 a 1.
[1-4757-3767001-2343-1300010000330330333333843303300000000000000033840]
Étape 2.20.2
Simplifiez R4.
[1-4757-3767001-2343-13000100000012811000000000000000033840]
[1-4757-3767001-2343-13000100000012811000000000000000033840]
Étape 2.21
Perform the row operation R7=R7-33R4 to make the entry at 7,4 a 0.
Étape 2.21.1
Perform the row operation R7=R7-33R4 to make the entry at 7,4 a 0.
[1-4757-3767001-2343-1300010000001281100000000000000-33⋅00-33⋅00-33⋅033-33⋅184-33(2811)0-33⋅0]
Étape 2.21.2
Simplifiez R7.
[1-4757-3767001-2343-130001000000128110000000000000000000]
[1-4757-3767001-2343-130001000000128110000000000000000000]
Étape 2.22
Perform the row operation R2=R2-43R4 to make the entry at 2,4 a 0.
Étape 2.22.1
Perform the row operation R2=R2-43R4 to make the entry at 2,4 a 0.
[1-4757-376700-43⋅01-43⋅0-23-43⋅043-43⋅1-13-43⋅28110-43⋅0001000000128110000000000000000000]
Étape 2.22.2
Simplifiez R2.
[1-4757-3767001-230-41110001000000128110000000000000000000]
[1-4757-3767001-230-41110001000000128110000000000000000000]
Étape 2.23
Perform the row operation R1=R1+37R4 to make the entry at 1,4 a 0.
Étape 2.23.1
Perform the row operation R1=R1+37R4 to make the entry at 1,4 a 0.
[1+37⋅0-47+37⋅057+37⋅0-37+37⋅167+37⋅28110+37⋅001-230-41110001000000128110000000000000000000]
Étape 2.23.2
Simplifiez R1.
[1-4757015077001-230-41110001000000128110000000000000000000]
[1-4757015077001-230-41110001000000128110000000000000000000]
Étape 2.24
Perform the row operation R2=R2+23R3 to make the entry at 2,3 a 0.
Étape 2.24.1
Perform the row operation R2=R2+23R3 to make the entry at 2,3 a 0.
[1-475701507700+23⋅01+23⋅0-23+23⋅10+23⋅0-4111+23⋅00+23⋅0001000000128110000000000000000000]
Étape 2.24.2
Simplifiez R2.
[1-475701507700100-41110001000000128110000000000000000000]
[1-475701507700100-41110001000000128110000000000000000000]
Étape 2.25
Perform the row operation R1=R1-57R3 to make the entry at 1,3 a 0.
Étape 2.25.1
Perform the row operation R1=R1-57R3 to make the entry at 1,3 a 0.
[1-57⋅0-47-57⋅057-57⋅10-57⋅015077-57⋅00-57⋅00100-41110001000000128110000000000000000000]
Étape 2.25.2
Simplifiez R1.
[1-47001507700100-41110001000000128110000000000000000000]
[1-47001507700100-41110001000000128110000000000000000000]
Étape 2.26
Perform the row operation R1=R1+47R2 to make the entry at 1,2 a 0.
Étape 2.26.1
Perform the row operation R1=R1+47R2 to make the entry at 1,2 a 0.
[1+47⋅0-47+47⋅10+47⋅00+47⋅015077+47(-4111)0+47⋅00100-41110001000000128110000000000000000000]
Étape 2.26.2
Simplifiez R1.
[1000-21100100-41110001000000128110000000000000000000]
[1000-21100100-41110001000000128110000000000000000000]
[1000-21100100-41110001000000128110000000000000000000]
Étape 3
Use the result matrix to declare the final solution to the system of equations.
x1-211x5=0
x2-4111x5=0
x3=0
x4+2811x5=0
0=0
0=0
0=0
Étape 4
Write a solution vector by solving in terms of the free variables in each row.
[x1x2x3x4x5]=[2x51141x5110-28x511x5]
Étape 5
Write the solution as a linear combination of vectors.
[x1x2x3x4x5]=x5[21141110-28111]
Étape 6
Write as a solution set.
{x5[21141110-28111]|x5∈R}