Question

The order of [x y z] `[("a","h","g"),("h","b","f"),("g","f","c")] [("x"),("y"),("z")]` is ____________.

Options

•  1 x 2

• 1 x 1

• 3 x 3

• 3 x 1

Answer 1

The order of [x y z] `[("a","h","g"),("h","b","f"),("g","f","c")] [("x"),("y"),("z")]` is 1 x 1.

Explanation:

`["x y z"]_(1 xx 3) [("a","h","g"),("h","b","f"),("g","f","c")]_(3 xx 3) [("x"),("y"),("z")]_(3 xx 1) = ["A"]_(1 xx 1)` (where ; matrix A denotes the product of three given matrices.)