Posted by **mike** on Thursday, December 17, 2009 at 3:53pm.

Need to find the sizes of the product AB and the product BA whenever these exist. We are given A and B

A is 4 x 3, B is 3 x 6

- Matrices -
**MathMate**, Thursday, December 17, 2009 at 5:47pm
I assume these are the sizes of matrices.

A is 4x3 meaning that there are 4 rows and 3 columns.

***

***

***

***

B is 3x4 meaning that there are 3 rows and 4 columns

####

####

####

A matrix product is meaningful (exists) if and only if the number of columns of the first matrix equals the number of rows of the second matrix, i.e.

Apq X Bqr = Cpr

While Bqr X Apq does not exist unless r=q.

## Answer This Question

## Related Questions

- nvcc - The sizes of two matrices A and B are given. Find the sizes of the ...
- economics - when you are given the units of resource, total product, and ...
- algebra 1 - Which statement about the product is true? 7.56*6.7 ̅? a)the ...
- Accounting - Cambridge Manufacturing Company, Inc. has 200 labor-hours available...
- Managerial Accounting - The overhead rate for materials handling is $10 per part...
- Algebra - Which statement about the product is true? 5.5 Square Root 5 A)The ...
- Business Management - I have just came across the words product-led and market-...
- math - Find the two numbers that multiply to the product number and add to the ...
- Product curves - If the short run total product curve is a linear function of ...
- Pre-Cal - There exist two complex numbers c, say c1 and c2, so that 2 + 2i, 5 + ...

More Related Questions