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2 cards from this section. Quick, good the night before a test.
What is the inverse of a 2x2 identity matrix?
Consider what happens when you multiply it with itself.
Can a matrix with a determinant of 0 have an inverse?
Recall the definition of determinant and its significance.
What is a requirement for a matrix to have an inverse?
Think about the shape of the matrix.
True or False: The determinant of an invertible matrix is always positive.
Remember, it's the value being non-zero that matters.
Given a 4x4 matrix B, calculate its inverse using MATLAB and discuss the implications of its determinant.
Always check the determinant before proceeding with the inverse.
Create a 3x3 matrix where you know its inverse should exist. Verify the calculation manually and using MATLAB.
Double-check your calculations with MATLAB.
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