# Matrix Multiplication Question — What matrix do you get with these matrix multiplications?

No Effort: Member warned that some effort must be shown

## Homework Statement:

Anyone who understands this?

## Relevant Equations:

I think it has something to do with multiplying matrix A and B? But I can't figure out.

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etotheipi
Gold Member
2019 Award
If matrix ##P## has dimensions ##w \times x## and matrix ##Q## has dimensions ##y \times z##, what is the condition for the product ##PQ## to be defined? Think in terms of rows and columns...

WWGD and Math_QED
The new matrix will be 2x3..

But I still cant understand it ://

etotheipi
Gold Member
2019 Award
What is the relationship between the number of columns in the matrix on the left and the number of rows in the matrix on the right, when they’re multiplied together?

PeroK
Homework Helper
Gold Member
The new matrix will be 2x3..

But I still cant understand it ://
Why don't you try to calculate the matrix ##C## in each case? See which ones you can do and which ones you can't.

WWGD, conv and etotheipi
I cant find out how to do that in my book. Have tried for a long time now.
What does the A^T and B^T represent?

PeroK