2 Answers

Ewalshe · Answer 1 · 2019-03-08T13:30:17+0000

Answer:

4) CD =DC = 1 is true .

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 .

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