Solve x+y+z=9, 2x+5y+7z=52, 2x+y-z=0 using matrix inversion method.
Answers
Answered by
31
Step-by-step explanation:
Given Solve x+y+z=9, 2x+5y+7z=52, 2x+y-z=0 using matrix inversion method.
- So we have
- Let A = 1 1 1 x 9
- 2 5 7 x = y D = 52
- 2 1 - 1 z 0
- So A1 = 5 7
- 1 - 1
- So – 5 – 7 = - 12
- Now B1 = - 2 7
- 2 - 1
- So – (– 2 – 14 ) = 16
- Now C1 = 2 5
- 2 1
- So 2 – 10 = - 8
- Now A2 = - 1 1
- 1 - 1
- So we get – (– 1 – 1) = - (- 2) = 2
- Now B2 = 1 1
- 2 - 1
- So we get – 1 – 2 = - 3
- Now C2 = - 1 1
- 2 1
- So we get – (1 – 2) = - (- 1) = 1
- Now A3 = 1 1
- 5 7
- So we get 7 – 5 = 2
- Now B3 = - 1 1
- 2 7
- So we get – (7 – 2) = - 5
- Now C3 = 1 1
- 2 5
- So we get 5 – 2 = 3
- So Adjoint A = A1 A2 A3 - 12 2 2
- B1 B2 B3 = 16 - 3 - 5
- C1 C2 C3 - 8 1 3
- Determinant A = a1 A + b1B + c1C
- = 1(- 12) + 1(16) + 1(-8)
- = - 4
- So A^-1 = Adj A / Det A
- = - ¼ - 12 2 2
- 16 -3 - 5
- -8 1 3
- Now X = A^-1 D
- = - ¼ - 12 2 2 9
- 16 -3 - 5 52
- -8 1 3 0
- = - ¼ - 108 104 0
- 144 -156 0
- -72 52 0
- = - ¼ - 4
- -12
- -20
- 1
- = 3
- 5
- Or X = x 1
- y = 3
- z 5
- Therefore x = 1, y = 3 and z = 5
Reference link will be
https://brainly.in/question/4712366
Answered by
14
Answer:
✨X=1✨
✨Y=3✨
✨AND✨
✨Z=5✨
✨hope it helps you ✨
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