Question

Which matrix is the product of a 3 × 3 identity matrix and the scalar 3?
[3 3 3] [ 3 8 -4] [3 0 0] [3 1 1]
[3 3 3] [ 1 3 2] [0 3 0] [1 3 1]
[3 3 3], [-1 -2 3], [0 0 3], or [1 1 3]

Answer 1

@jim_thompson5910 please help

Answer 2

What is the 3 x 3 identity matrix ?

Answer 3

it doesnt say :(

Answer 4

but you are supposed to know :)

Answer 5

1 0 0
0 1 0
0 0 1

Answer 6

yup, if the scalar multiplication is 3, then the result of \(3\left[\begin{matrix} 1&0&0\\0&1&0\\0&0&1\end{matrix}\right]\) is?

Answer 7

just multiply 3 into each of the entries.

Answer 8

300
030
003

Answer 9

you got it

Answer 10

:)thanks for helping