Question

What is 2A?
A= [4 9 13 5]

Answer 1

Multiply each entry by 2!

Explanation:

Multiplying a matrix by a constant means to multiply each entry by that constant.

According to that, 2A would be the result of each entry being multiplied by 2.

That is equal to
`$ 2A = \begin{pmatrix}2(4) & 2(9) \\2(13) & 2(5) \\\end{pmatrix}`

`$ \implies 2A = \begin{pmatrix}8 & 18 \\26 & 10 \\\end{pmatrix}`

Hence, the answer.