#1Can you multiply a 4 x 2 and a 3 x 4 matrix? Explain. Select one: a. Yes. You will end up with a 4 x 3 matrix. Incorrect b. Yes. You will end up with a 4 x 4 matrix. c. No. The matrices will result in a square matrix. d. No. The answer does not exist.
so then i would be d right ? or am i wrong ?
if matrix A is 4x2 and matrix B is 3x4, then A*B does not exist. It is not possible to multiply this way
awsome thankyou so much do you have time for the rest ?
how many more?
sure, go for it
#2 Which dimension determines the product matrix dimension? Select one: a. The inner dimensions b. The outer dimensions c. The cross-multiplied dimensions d. The first row of each matrix Incorrect
let's say we had matrix A be of size 3x2 and matrix B of size 2x7
A*B is defined because the inner dimensions match |dw:1437703383382:dw|
A*B would be 3x7 because these are the outer dimensions |dw:1437703430691:dw|
im a bit confused forgive me if i seem dumb but then wich one the product matrix dimension ?
A*B is considered the product matrix
3x7 is the dimension of A*B
3x7 ---> 3 rows, 7 columns
so it would be B outer dimensions?
alrighty i see your good ! heres the last
The product of a 3 x 3 and a 6 x 6 matrix would be: Select one: a. 3 x 6 Incorrect b. 6 x 6 c. 3 x 3 d. Does not exist
you tell me (hint: look at the first problem we went over)
ahh so d ?
mmmm isnt it because the inner dimensions do NOT match. They need to be the same number to multiply the matrices
correct, the 3 and 6 don't match so A*B doesn't exist
awsome thankyou so much for your help ! (:
glad to be of help