Matrices review pre flashcard
Flashcard
•
Mathematics
•
12th Grade
•
Practice Problem
•
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 matrix multiplication?
Back
Matrix multiplication involves multiplying rows of the first matrix by columns of the second matrix, resulting in a new matrix.
3.
FLASHCARD QUESTION
Front
What are the conditions for matrix multiplication to be possible?
Back
The number of columns in the first matrix must equal the number of rows in the second matrix.
4.
FLASHCARD QUESTION
Front
What is the determinant of a 2x2 matrix?
Back
For a matrix [[a, b], [c, d]], the determinant is calculated as ad - bc.
5.
FLASHCARD QUESTION
Front
How do you calculate the determinant of a 3x3 matrix?
Back
The determinant of a 3x3 matrix can be calculated using the rule of Sarrus or cofactor expansion.
6.
FLASHCARD QUESTION
Front
What does it mean if the determinant of a matrix is zero?
Back
If the determinant is zero, the matrix is singular, meaning it does not have an inverse.
7.
FLASHCARD QUESTION
Front
What is an identity matrix?
Back
An identity matrix is a square matrix with ones on the diagonal and zeros elsewhere.
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