Sophia's school took a field trip a total of 21 vehicles were needed for the trip some students took the bus and some students c
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Complete Question
The complete question is shown on the first uploaded image
Answer:
First Question
Option A is correct
Second Question
Option C is correct
Third Question
Fourth Question
So substituting for D in (ABC) D = I
This proof that ABC is invertible
Step-by-step explanation:
From the question we are told that
A , B and C are invertible which means that exist
Now
From the question
(ABC) D = I
Where I is an identity matrix
Now when we multiply both sides by we have
Now when we multiply both sides by we have
Now when we multiply both sides by we have
So substituting for D in the above equation
This proof that ABC is invertible
