If A is a 2 × 3 matrix, and B is a 3 × 4 matrix, how many columns does AB have?

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter6: Matrices And Determinants
Section: Chapter Questions
Problem 7CC: If A and B are matrices with the same dimension and k is a real number, how do you find A+B and kA ?
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If A is a 2 × 3 matrix, and B is a 3 × 4 matrix, how many columns does AB have?

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