Question

2x+y-3z=3 x+y+z=-1 3x-y+2z=0 Solve the system of equations using Cramer's Method

179

likes
896 views

Answer to a math question 2x+y-3z=3 x+y+z=-1 3x-y+2z=0 Solve the system of equations using Cramer's Method

Expert avatar
Esmeralda
4.7
95 Answers
İlk olarak, denklem sistemimizi matris formuna dönüştürelim:
\begin{pmatrix} 2 & 1 & -3 \ 1 & 1 & 1 \ 3 & -1 & 2 \end{pmatrix} \begin{pmatrix} x \ y \ z \end{pmatrix} = \begin{pmatrix} 3 \ -1 \ 0 \end{pmatrix}
Şimdi, Cramer'ın kuralını kullanarak çözüm yapalım. İlk olarak ana matrisin determinantını hesaplayalım, D :
D = \begin{vmatrix} 2 & 1 & -3 \ 1 & 1 & 1 \ 3 & -1 & 2 \end{vmatrix}
Şimdi, x için determinantı D_x bulalım:
D_x = \begin{vmatrix} 3 & 1 & -3 \ -1 & 1 & 1 \ 0 & -1 & 2 \end{vmatrix}
Sonra, y için determinantı D_y bulalım:
D_y = \begin{vmatrix} 2 & 3 & -3 \ 1 & -1 & 1 \ 3 & 0 & 2 \end{vmatrix}
En son olarak, z için determinantı D_z bulalım:
D_z = \begin{vmatrix} 2 & 1 & 3 \ 1 & 1 & -1 \ 3 & -1 & 0 \end{vmatrix}
Şimdi, D , D_x , D_y ve D_z 'yi hesapladık, bu değerleri kullanarak x , y ve z değerlerini bulabiliriz. \

D=\begin{vmatrix}2 & 1 & -3 \ 1 & 1 & 1 \ 3 & -1 & 2\end{vmatrix}=19

D_x=\begin{vmatrix}3 & 1 & -3 \ -1 & 1 & 1 \ 0 & -1 & 2\end{vmatrix}=8

D_y=\begin{vmatrix}2 & 3 & -3 \ 1 & -1 & 1 \ 3 & 0 & 2\end{vmatrix}=-10

D_z=\begin{vmatrix}2 & 1 & 3 \ 1 & 1 & -1 \ 3 & -1 & 0\end{vmatrix}=-17

Son olarak, x , y ve z değerlerini bulmak için aşağıdaki formülleri kullanacağız:

x=\frac{D_x}{D}=\frac{8}{19}

y=\frac{D_y}{D}=\frac{-10}{19}

z=\frac{D_z}{D}=\frac{-17}{19}

\boxed{x=\frac{8}{19},\quad y=\frac{-10}{19},\quad z=-\frac{17}{19}}

Frequently asked questions (FAQs)
What is the period of the trigonometric function f(x) = 2cos(3x) in radians?
+
Math question: Find the extrema for the function f(x) = x^3 - 6x^2 + 9x + 2 over the interval [-2, 4].
+
What is the length of the perpendicular bisector segment of an isosceles triangle with base 8 cm and height 10 cm?
+
New questions in Mathematics
A normal random variable x has a mean of 50 and a standard deviation of 10. Would it be unusual to see the value x = 0? Explain your answer.
A software company incurs a cost of $50 per license sold plus $5,000 in fixed costs. How many licenses should you sell to minimize total costs?
A normally distributed population has a mean of 118 with a standard deviation of 18. What score separates the lowest 72% of the distribution from the rest of the scores?
90 divided by 40
Let I ⊂ R be a bounded and nonempty interval. Show that there are numbers a, b ∈ R with a ≤ b and I =[a,b] or I =[a,b) or I =(a,b] or I =(a,b)
Suppose X has a Poisson distribution, with a mean of 0.4. Determine the probability that x is at most 2.
Find the root of x^4-10x^ 5=0 using Newton's method, with a precision of the smallest positive root.
Perpetual annuities are a series of payments whose duration has no end. Explain how can we calculate them, if they have no end?
41/39 - 1/38
The equation of the straight line that passes through the coordinate point (2,5) and is parallel to the straight line with equation x 2y 9 = 0 is
What is 28 marks out of 56 as a percentage
Express the trigonometric form of the complex z = -1 + i.
17. A loan for $104259 is taken out for 10 years with an annual interest rate of 9.4%, compounded quarterly. What quarterly payment is required to pay the loan off in 10 years? Enter to the nearest cent (two decimals). Do not use $ signs or commas in the answer.
A 20-year old hopes to retire by age 65. To help with future expenses, they invest $6 500 today at an interest rate of 6.4% compounded annually. At age 65, what is the difference between the exact accumulated value and the approximate accumulated value (using the Rule of 72)?
The mean of 4 numbers is 5 and the mean of 3 different numbers is 12. What is the mean of the 7 numbers together? Produce an algebraic solution. Guess and check is acceptable.
4m - 3t + 7 = 16
For how long does the principal amount of €7,537 bring the same interest as the principal amount of €12,345 invested for 8 months? Interest calculation is simple and decursive.
-1/3x+15=18
Let A denote the set of all people who were alive in 2010. Let B denote the set of all real numbers. Let f assign, to each person in A, their weight during the year 2010. Is f a function? Explain in complete sentences.
f(x)= 9-x^2 find (f(x+h)-f(x) )/h