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NikkyZ9487
08.07.2020 •
Mathematics
I NEED HELP PLEASE, THANKS! Use Cramer's Rule to find the solution of the system of linear equations, if a unique solution exists. –5x + 2y – 2z = 26 3x + 5y + z = –22 –3x – 5y – 2z = 21 A. (–1, –7, 2) B. (–6, –1, 1) C. (–1, 3, 1) D. no unique solution
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Ответ:
Option B
Step-by-step explanation:
We are given the following system of equations -
Now by Cramer's Rule, we would first write down the matrix of the coefficients , replacing each column with the answer column -
Replace each column of the coefficients shown at the top, with the answer column at the bottom respectively -
Now solve through Cramer's Rule -
x = Dx / D = - 6,
y = Dy / D = - 1,
z = Dz / D = 1
Solution = ( - 6, - 1, 1 ) = Option B
Ответ:
the answer is B a(n)=3x120^n-1
Step-by-step explanation: