Matrices Review

Flashcard
•
Mathematics
•
11th - 12th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a matrix?
Back
A matrix is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns.
2.
FLASHCARD QUESTION
Front
What is the determinant of a matrix?
Back
The determinant is a scalar value that is a function of the entries of a square matrix, providing important properties such as whether the matrix is invertible.
3.
FLASHCARD QUESTION
Front
How do you calculate the determinant of a 2x2 matrix?
Back
For a 2x2 matrix [[a, b], [c, d]], the determinant is calculated as ad - bc.
4.
FLASHCARD QUESTION
Front
What does it mean for two matrices to be inverses of each other?
Back
Two matrices A and B are inverses if their product is the identity matrix, i.e., AB = I and BA = I.
5.
FLASHCARD QUESTION
Front
How do you find the inverse of a 2x2 matrix?
Back
For a 2x2 matrix [[a, b], [c, d]], the inverse is given by (1/det(A)) * [[d, -b], [-c, a]], where det(A) = ad - bc.
6.
FLASHCARD QUESTION
Front
What is matrix multiplication?
Back
Matrix multiplication involves multiplying rows of the first matrix by columns of the second matrix, resulting in a new matrix.
7.
FLASHCARD QUESTION
Front
What are the conditions for matrix multiplication to be defined?
Back
Matrix multiplication is defined when the number of columns in the first matrix equals the number of rows in the second matrix.
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