
Гургула, Мойсишин "Розрахи з матана",
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7 −16 . 22
−3
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12 9 7 8 −6 |
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−6 −4 1 −7 3 |
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1 2 3 2 −5 |
74
Задача 8. Довести сумісність даної системи лінійних алгебраїчних рівнянь і розв’язати її: а) методом Гаусса; б) матричним методом; в) методом Крамера.
y+ 3z = −4,
8.1.− x + 4 y + z = 2,5x + y − 2z =8.−x2
6x + 4 y + z = −1,
8.3.−2x − y +3z = 4,x −2 y −4z = −7.
3x +5 y +3z = −3, 8.5. 4x + 4 y + z = −7,− x −6 y + 2z = 4.
x − 7 y + 3z = 5, 8.7. −3x + 5 y − 4z = 5,2x − 2 y −3z = −8.
−2x −3y +3z = 7,
8.9. x −4 y −5z = −5,
−3x + 2 y +7z = 9.
3x −2 y +3z = 0,
8.11.− x −4 y −2z = 6,−5x + y −4z = −2.
4x −3y −5z = 2,
8.2. 3x − y + 2z = 6,x −2 y −3z = 0.
x +6 y −8z = −1, 8.4. −5x + 4 y +7z = 6,9x −3y + 2z = 8.
=−6,
8.6.x −3y −6z = 7,3x −3y +8z = 9.+ y 7z4x −−
=−9,
8.8.−3x + 2 y + 2z = −3,4x − y −3z = 3.+7z−4 yx−
5x +3y −5z =1,
8.10.−6x − y −4z = −6,− x −2 y +7z = 3.
+2 y
8.12.3x −4 y −4z = 7,x + 2 y −3z = 6.− z = 9,−4x
− x +3y + z = 3,
8.13.−5x −2 y −6z = −8,2x −2 y −3z = 3.
−3x + 2 y −8z =1,
8.15.5x +5 y + z = −6,− x −6 y + 2z = 9.
x −9 y +3z = 8,
8.17.−2x +5 y + 4z = 4,5x −3y −2z = 6.
−5x −3y + 2z = 0,
8.19.x −4 y +5z = −7,7x −2 y + 4z = −8.
9x − y +3z = 6,
8.21.− x + 4 y +5z = −7,−5x + y −2z = −5.
6x + 4 y −9z = 9,
8.23.−2x −3y +5z = −1,x −3y −2z =1.
4x −5 y −4z = −7,
8.25. 3x + y −7z = 9,
− x −2 y + 2z = −8.
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x −3y −5z = −4,
8.14.−2x + 4 y +7z = 6,4x −3y −2z = 2.
−− = −8,
8.16.x −5 y − 2z = 9,3x −3y +8z =1.y 7z−8x
− x + 4 y +5z = 6, 8.18 6x −4 y +3z = 4,−4x +3y + z = −2.
6x −5 y −5z = 3,
8.20.−4x − y + 4z = 5,− x −7 y + 2z = −6.
−4x + 2 y −5z = −7,
8.22. 7x −6 y + 2z = 8,
x −3y −2z = −8.
x +6 y + z = 6, 8.24. −3x −4 y − z = 2,
2x −3y +5z = 6.
−4x +7 y −3z = −5,
8.26. x −4 y +3z = 8,
6x −9 y +5z = 9.
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x −4 y + 2z = 7, 8.27. −5x + 2 y −4z = −7,
2x −2 y +3z = 5.
−2x −3y −2z = −6,
8.29. x −4 y −3z = 4,
−4x +3y −2z = 0.
− x −5 y +3z = 6,
8.28.−2x + 2 y −3z = −3,4x − y +3z = 0.
5x +3y +5z = −9, 8.30. 7x −5 y −3z = −5,− x −4 y −6z = 2.
Задача 9. Розв′язати однорідну систему лінійних алгебраїчних рівнянь, визначивши при цьому розмірність лінійного простору – множини розв′язків даної системи і вказавши який-небудь базис цього простору.
3x1 + 2x2 − x3 − 4x4 + 3x5 = 0,
− 2x1 + 3x2 + 2x3 − x4 −5x5 = 0,
9.1.
5x1 − x2 −3x3 −3x4 +8x5 = 0,x1 +5x2 + x3 −5x4 − 2x5 = 0.
− x1 +3x2 + 2x3 − x4 + 2x5 = 0,
9.2. 4x1 −2x2 + 2x3 +3x4 −4x5 = 0,3x1 + x2 + 4x3 + 2x4 −2x5 = 0,
2x1 + 4x2 +6x3 + x4 = 0.−2x2 +3x3 + x4 −3x5 = 0,
9.3. x1 − x2 −4x3 + 2x4 −2x5 = 0,
2x1 −4x2 −5x3 +5x4 −7x5 = 0,
2x1 −3x3 + x4 + 2x5 = 0.
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x1 −3x2 −2x3 + 4x4 +3x5 = 0,
−2x1 + x2 −3x3 − x4 +5x5 = 0,
9.4.
4x1 −7x2 − x3 +9x4 + x5 = 0,5x1 −5x2 + x3 −2x4 + x5 = 0.
−3x1 −4x2 + 2x3 + x4 − x5 = 0,
9.5. −5x1 + x2 + 4x3 −3x4 + 4x5 = 0,x1 +9x2 −5x4 +6x5 = 0,
−8x1 −3x2 +6x3 −2x4 +3x5 = 0.5x1 + 2x2 +3x3 + x4 +3x5 = 0,
−4x1 +3x2 −5x3 −3x4 −7x5 = 0,
9.6.
x1 +5x2 −2x3 −2x4 −4x5 = 0,−3x1 −2x3 +5x4 −2x5 = 0.
1− x2 + 4x4 −2x5 = 0,
9.7.− x1 −4x2 + 2x3 +3x4 − x5 = 0,3x1 +5x2 −6x3 − x4 + x5 = 0,
−4x1 −9x2 + 4x3 +11x4 −4x5 = 0.3x1 − x2 + 2x3 −4x4 +3x5 = 0,
9.8.2x1 +3x2 −5x3 −2x4 − x5 = 0,
5x1 + 2x2 −3x3 −6x4 + 2x5 = 0,
x1 −4x2 +7x3 −2x4 + 4x5 = 0.−2x
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−4x2 − x3 −3x4 +9x5 = 0,
−2x1 + 2x2 +3x3 +3x4 − x5 = 0,
9.9.
x1 −3x2 −2x3 −3x4 +5x5 = 0,3x1 −4x2 + x3 + 2x4 − x5 = 0.
4x1 +7x3 +3x4 +8x5 = 0,
9.10.− x1 −2x2 −3x3 −4x4 − x5 = 0,−3x1 + 2x2 −4x3 + x4 −7x5 = 0,2x1 −4x2 + x3 −5x4 +6x5 = 0.
5x1 + x2 −10x3 −9x4 +16x5 = 0,
9.11.4x1 −7x2 −8x3 +5x5 = 0,
3x1 −2x2 −6x3 −3x4 +7x5 = 0,
x1 −5x2 −2x3 +3x4 −2x5 = 0.−4x1 −7x2 − x3 −2x5 = 0,
9.12.5x1 +5x2 +5x3 +3x4 −2x5 = 0,2x1 + x2 +3x3 + 2x4 −2x5 = 0,3x1 + 4x2 + 2x3 + x4 = 0.
−2x2 +3x3 −13x4 −3x5 = 0,
9.13.x1 + 2x2 −4x3 +6x5 = 0,
4x1 −2x2 −3x3 + 2x4 −5x5 = 0,
5x1 −7x3 + 2x4 + x5 = 0.
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x1 −2x2 −5x3 +3x4 + x5 = 0,
9.14. −3x1 + x2 −3x3 −4x4 +5x5 = 0,
4x1 −3x2 −2x3 +7x4 −4x5 = 0,
7x1 −4x2 + x3 +11x4 −9x5 = 0.
−2x1 − x2 + 2x3 + x4 − x5 = 0,
−7x1 +3x2 + 4x3 −3x4 +5x5 = 0,
9.15.
x1 +7x2 −4x3 −7x4 +9x5 = 0,−3x1 +5x2 −5x4 +7x5 = 0.
6x1 + 4x2 +5x3 + 2x4 + x5 = 0,
9.16. −5x1 +3x2 −5x3 −4x4 −3x5 = 0,x1 +7x2 −2x4 −2x5 = 0,
−4x1 −3x3 +5x4 −3x5 = 0.
1− x2 + 2x4 −6x5 = 0,
9.17.− x1 −2x2 +3x3 +3x4 −2x5 = 0,2x1 − x2 +3x3 + x4 + 4x5 = 0,−4x1 −3x2 +3x3 +5x4 −8x5 = 0.
7x1 −3x2 + 2x3 −2x4 +3x5 = 0,
9.18.3x1 +3x2 +5x3 −4x4 −2x5 = 0,−5x1 + x2 −3x3 + 4x4 + 2x5 = 0,x1 −9x2 −8x3 +6x4 +7x5 = 0.−3x
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−3x1 + 2x2 −4x3 −6x4 + 4x5 = 0,
9.19.5x1 −6x2 −2x3 = 0,
x1 −2x2 −3x3 −3x4 + 2x5 = 0,4x1 −4x2 + x3 +3x4 −2x5 = 0.
3x1 +5x3 + 2x4 +6x5 = 0,
9.20.− x1 −3x2 −2x3 − x4 −4x5 = 0,
−4x1 −3x2 −7x3 −3x4 −10x5 = 0,
2x1 −3x2 +3x3 + x4 + 2x5 = 0.
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−3x1 +5x2 + 2x3 −3x4 − x5 = 0, |
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9.21. |
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7x1 −2x2 −4x3 − x4 + 2x5 = 0, |
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− x1 + 4x2 + x3 −3x4 + x5 = 0,
9.22.2x1 −4x2 +3x3 + 2x4 −5x5 = 0,
3x1 −8x2 + 2x3 +5x4 −6x5 = 0,
−4x1 −7x2 +6x3 + x4 = 0.−4x2 −5x3 −5x5 = 0,
9.23.x1 −3x2 −2x3 +3x4 −4x5 = 0,3x1 −5x2 − x3 +9x4 −7x5 = 0,5x1 −3x3 +3x4 + 2x5 = 0.