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taras999999
@taras999999
September 2021
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Решите уравнение методом Крамера
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MizoriesKun
| -2 3 -1 |
Δ | 3 -2 1 | = (-2)*(-2)*(-3) + 3*1*(-1) + 3*1*(-1) -(-1)*(-2)*(-1) -1*1*(-2) -
| -1 1 -3 |
-3*3*(-3)=-12-3-3+2+2+27=13 - определитель матрицы
ряд свободных членов -1
6
-4
| -1 3 -1 |
Δх₁ | 6 -2 1 | = (-1)*(-2)*(-3) + 6*1*(-1) + 3*1*(-4) - (-1)*(-2)*(-4) -
| -4 1 -3 |
-1*1*(-1) -3*6*(-3)= -6-6-12+8+1+54= 39
| -2 -1 -1 |
Δx₂ | 3 6 1 | = (-2)*6*(-3) + 3*(-4)*(-1) +(-1)*1*(-1) - (-1)*6*(-1) -
| -1 -4 -3 |
-1*(-4)*(-2) - (-1)*3*(-3)=36+12+1-6-8-9=26
| -2 3 -1 |
Δx₃ | 3 -2 6 | = (-2)*(-2)*(-4) + 3*1*(-1) + 3*6*(-1) - (-1)*(-2)*(-1) -
| -1 1 -4 |
- 6*1*(-2) - 3*3*(-4) =-16-3-18+2+12+36=13
Δх₁ 39
х₁= ---- = ----- =3
Δ 13
Δх₂ 26
х₂= ----- = ------ =2
Δ 13
Δх₃ 13
х₃ = ----- = ----- = 1
Δ 13
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Answers & Comments
Δ | 3 -2 1 | = (-2)*(-2)*(-3) + 3*1*(-1) + 3*1*(-1) -(-1)*(-2)*(-1) -1*1*(-2) -
| -1 1 -3 |
-3*3*(-3)=-12-3-3+2+2+27=13 - определитель матрицы
ряд свободных членов -1
6
-4
| -1 3 -1 |
Δх₁ | 6 -2 1 | = (-1)*(-2)*(-3) + 6*1*(-1) + 3*1*(-4) - (-1)*(-2)*(-4) -
| -4 1 -3 |
-1*1*(-1) -3*6*(-3)= -6-6-12+8+1+54= 39
| -2 -1 -1 |
Δx₂ | 3 6 1 | = (-2)*6*(-3) + 3*(-4)*(-1) +(-1)*1*(-1) - (-1)*6*(-1) -
| -1 -4 -3 |
-1*(-4)*(-2) - (-1)*3*(-3)=36+12+1-6-8-9=26
| -2 3 -1 |
Δx₃ | 3 -2 6 | = (-2)*(-2)*(-4) + 3*1*(-1) + 3*6*(-1) - (-1)*(-2)*(-1) -
| -1 1 -4 |
- 6*1*(-2) - 3*3*(-4) =-16-3-18+2+12+36=13
Δх₁ 39
х₁= ---- = ----- =3
Δ 13
Δх₂ 26
х₂= ----- = ------ =2
Δ 13
Δх₃ 13
х₃ = ----- = ----- = 1
Δ 13