Matrix Arithmetic flashcards
13 practice cards drawn from the Matrix Arithmetic lessons. Tap a card to turn it over. Every answer is checked against the lesson it came from.
Read the Matrix Arithmetic lessons in full →
What is the order of this matrix?
2 × 4
from “The Order of a Matrix”
Which number sits in row 3, column 2?
8
from “The Order of a Matrix”
What goes in row 1, column 2 of A + B?
8
from “Adding, Subtracting and Scaling Matrices”
Multiply this matrix by 4. What goes in row 1, column 1?
32
from “Adding, Subtracting and Scaling Matrices”
Can this product be worked out?
no
from “The Matrix Product”
What is the order of this product?
4 × 2
from “The Matrix Product”
Which must sit on the right for the product to give takings?
the prices, one under the other
from “Combining Data with a Matrix Product”
The product is a column. What does the number in row 2 mean?
what shop B took altogether
from “Combining Data with a Matrix Product”
Which of these always holds for two 2 × 2 matrices?
A + B = B + A
from “Why AB Differs from BA”
What is the order of the product drawn here?
2 × 3
from “Why AB Differs from BA”
What does this product come to?
(5 4; 5 4)
from “The Identity and Zero Matrices”
Why is checking A, and not a proof?
it leaves every later power unchecked
from “Matrix Powers by Induction”
A = (1 1; 0 1). What is ?
(1 2; 0 1)
from “Matrix Powers by Induction”