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Solve by Cramer's rule :x + 2y,+ 3z = 6.2x + 4y + z = 7.3x + 2y + 9z = 14. |
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Answer» ONG>Answer: x ∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣
1
2 4 2
3 1 9
∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣
= ∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣
6 7 14
2 4 2
3 1 9
∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣
or xD=D 1
Operating C 1
−(C 2
+C 3
)on D 1
, we get D 1
= ∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣
1 2 3
2 4 2
3 1 9
∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣
= D. Hence xD = D or x=1 Similarly y=1,z=1. Step-by-step explanation: please thanks my all answer and follow me |
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