Maths
This question was asked in Ex 1.5,1

How to solve 4 x 3

Shelly Gupta's image
Shelly Gupta
May 4, 2019, 9:20 p.m.

Answers!

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May 5, 2019, 12:35 p.m.

For a matrix like this we have to select the matrix size from min(r,c) where r and c are row and column sizes . For ex in the image below we will have to find det of 3×3 matrix from it i.e select any 3 column of your choice and proceed.

Important: We can only multiply matrices if the number of columns in the first matrix is the same as the number of rows in the second matrix.

a) Multiplying a 2 × 3 matrix by a 3 × 4 matrix is possible and it gives a 2 × 4 matrix as the answer.

b) Multiplying a 7 × 1 matrix by a 1 × 2 matrix is okay; it gives a 7 × 2 matrix

c) A 4 × 3 matrix times a 2 × 3 matrix is NOT possible.

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