Question

Matrix A = [6 -12 4 8]. What is matrix X if 1/2x=A?

Answer 1

D) [12 8 -24 16]

Explanation:

edge2020 got it right

Answer 2

`X = \left[\begin{array}{cccc}12&-24&8&16\end{array}\right]`

Explanation:

A matrix is given by

`A = \left[\begin{array}{cccc}6&-12&4&8\end{array}\right]`

Now, we have to find the matrix X if
`(1)/(2) X = A`

⇒ X = 2A

Now, multiplication of a constant with a matrix means multiplication with that constant with all the terms of the matrix.

So,
`X = \left[\begin{array}{cccc}6 * 2&-12 * 2&4 * 2&8 * 2\end{array}\right]`

⇒
`X = \left[\begin{array}{cccc}12&-24&8&16\end{array}\right]` (Answer)