Solving Systems of Linear Equations
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Questions and Answers

Welche Methode løst ein System von linearen Gleichungen, indem sie eine Variable in einer Gleichung löst und den Ausdruck in die andere Gleichung substituiert?

  • Graphische Methode
  • Matrixmethode
  • Eliminationsmethode
  • Substitutionsmethode (correct)
  • Welche Methode løst ein System von linearen Gleichungen, indem sie die Gleichungen auf demselben Koordinatenplan graphisch darstellt?

  • Matrixmethode
  • Eliminationsmethode
  • Cramers Regel
  • Graphische Methode (correct)
  • Welche Methode løst ein System von linearen Gleichungen, indem sie die Koeffizienten der Variablen so multipliziert, dass sie die gleichen Koeffizienten haben?

  • Graphische Methode
  • Eliminationsmethode (correct)
  • Substitutionsmethode
  • Matrixmethode
  • Welche Methode løst ein System von linearen Gleichungen, indem sie eine Matrix in obere Dreiecksform transformiert?

    <p>Matrixmethode</p> Signup and view all the answers

    Welche Methode løst ein System von linearen Gleichungen, indem sie die Determinanten von Matrizen berechnet?

    <p>Cramers Regel</p> Signup and view all the answers

    Was ist das Ergebnis, wenn zwei Linien parallel sind?

    <p>Es gibt keine Lösung</p> Signup and view all the answers

    Was ist das Ergebnis, wenn zwei Linien zusammenfallen?

    <p>Es gibt unendlich viele Lösungen</p> Signup and view all the answers

    Welche Methode løst ein System von linearen Gleichungen, indem sie eine Gleichung nach einer Variablen auflöst und dann den Ausdruck in die andere Gleichung substituiert?

    <p>Substitutionsmethode</p> Signup and view all the answers

    Was ist die Matrixform, die eine system von linearen Gleichungen darstellt?

    <p>AX = B</p> Signup and view all the answers

    Welche Methode løst ein System von linearen Gleichungen, indem sie die Werte der Variablen durch Rückwärts-Einsetzen berechnet?

    <p>Matrixmethode</p> Signup and view all the answers

    Study Notes

    Solving Systems of Linear Equations

    Substitution Method

    • Solve one equation for one variable
    • Substitute the expression into the other equation
    • Solve the resulting equation for the other variable
    • Substitute the value back into one of the original equations to find the value of the first variable

    Elimination Method

    • Multiply the equations by necessary multiples such that the coefficients of one variable are the same
    • Add or subtract the equations to eliminate one variable
    • Solve the resulting equation for the remaining variable
    • Substitute the value back into one of the original equations to find the value of the other variable

    Graphical Method

    • Graph the two equations on the same coordinate plane
    • The point of intersection represents the solution to the system
    • If the lines are parallel, there is no solution
    • If the lines coincide, there are infinitely many solutions

    Matrix Method (Row Operations)

    • Write the system of equations in matrix form: AX = B
    • Perform row operations to transform the matrix into upper triangular form
    • Solve for the variables by back-substitution

    Cramer's Rule (Determinants)

    • Write the system of equations in matrix form: AX = B
    • Calculate the determinant of the coefficient matrix (A)
    • Calculate the determinants of the matrices obtained by replacing one column of A with the column vector B
    • The solution is given by the ratio of the determinants: x = det(Ax)/det(A), y = det(Ay)/det(A)

    Note: These methods can be used to solve systems of linear equations in two variables. The choice of method depends on the complexity of the system and personal preference.

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    Description

    Learn to solve systems of linear equations in two variables using five different methods: Substitution, Elimination, Graphical, Matrix, and Cramer's Rule. Understand the steps and applications of each method.

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