is it 3x1

is it 3x1

Tutors, please sign in to answer this question.

The formula you want to remember (or write in your notes) is:

**( m x n ) x ( n x p ) = ( m x p )**

The columns of the first matrix (n) need to equal the rows of the second matrix (n).

In your case, you have:

DC = (3 x 5) x ( 5 x 1)

Applying ( m x n ) x ( n x p ) = ( m x p ), you get the dimensions of DC:

( 3 x 1)

Hope that helps!

Hamsa F.

Proficient, flexible, and effective English and Test Prep Tutor

Kearny, NJ

Edward B.

STAT/MATH/Actuarial Science/MBA/Econ/Fin. - Ivy League Exp & Prof

New York, NY

4.9
(270 ratings)

Brook C.

Master's Degree in Mathematics

Brooklyn, NY

5.0
(3 ratings)