Question

If C and D are matrices and C is the inverse of D, which of the following is true?

Answer 1

Answer: Fourth option CD=DC=I 

Answer 2

Answer:

4) CD =DC = 1  is true .

Step-by-step explanation:

Given  : If C and D are matrices and C is the inverse of D.

To find  :  which of the following is true.

Solution : We have given that  C and D are matrices and C is the inverse of D.

By the inverse matrix rule  : $A^{}A^{-1} = [tex]A^{-1} A^{}$= 1[/tex].

Where $A^{-1}$ is inverse of A matrix .

Then CD =DC = 1

Therefore, 4) CD =DC = 1  is true .