Practice Role of Inverse Matrices in Solving Systems - 25.13 | 25. Solutions of Linear Systems: Existence, Uniqueness, General Form | Mathematics (Civil Engineering -1)
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Practice Questions

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Question 1

Easy

What is the definition of an inverse matrix?

💡 Hint: Think about multiplication and identity.

Question 2

Easy

If A is a 3x3 matrix, what type of matrix is it if A has an inverse?

💡 Hint: Think about the dimensions of the matrix.

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Interactive Quizzes

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Question 1

What is the condition for a matrix A to be invertible?

  • A must be square
  • A must be diagonal
  • A must have all non-zero elements

💡 Hint: Think about matrix dimensions.

Question 2

True or False: The inverse of a matrix is also a matrix.

  • True
  • False

💡 Hint: Consider what types of mathematical objects matrices are.

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Challenge Problems

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Question 1

Given the matrix A = [[2, -1, 0], [-1, 2, -1], [0, -1, 2]], compute the inverse, if it exists, and solve the system Ax = b for b = [1, 0, 0].

💡 Hint: First, calculate the determinant of A to ensure it is non-zero. Then apply the formula for the inverse and solve.

Question 2

Under what conditions would an inverse matrix yield a significantly different solution than LU decomposition in solving a linear system?

💡 Hint: Consider examples of matrices that may lead to instability.

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