Solving Systems Using Cramer's Rule

The video tutorial introduces Cramer's Rule as a method for solving systems of linear equations using determinants. It provides a detailed explanation of setting up coefficient matrices and replacing columns with constants to find solutions. The tutorial includes examples with two and three variables, demonstrating the calculation of determinants and the application of Cramer's Rule. It also discusses the advantages of using this method for complex systems with unique solutions.

What is the primary mathematical tool used in Cramer's Rule to solve systems of equations?

• Eigenvalues

• Determinants

• Matrix inversion

• Row reduction

In the example of solving for x1 in a 2x2 system, what is the determinant of the altered matrix?

• 2

• -4

• 10

• -8

What is the value of x2 in the 2x2 system example?

• 1

• 2

• 3

• 0

Why might Cramer's Rule be preferred over substitution or elimination for larger systems?

• It requires less computational power.

• It is simpler for systems with many variables.

• It provides exact solutions for any system.

• It is faster for all systems.

Under what condition can Cramer's Rule not be applied?

• When the system has more equations than variables.

• When the determinant of the coefficient matrix is zero.

• When the system is non-linear.

• When the system has complex numbers.

What is the determinant of the coefficient matrix in the 3x3 system example?

• 12

• 24

• -48

• 0

What is the value of x3 in the 3x3 system example?

• 0

• 1

• 2

• -4