What is the product of a matrix and its inverse?
A. 1
B. -1
C. Identity matrix
D. Square matrix

Question

What is the product of a matrix and its inverse?
	A.	1
	B.	-1
	C.	Identity matrix
	D.	Square matrix

loser66 · Answer

you pick first. I know you know.

anonymous · Answer

ok :) its A

anonymous · Answer

.... what the heck

loser66 · Answer

oh, I am sorry you are correct

hero · Answer

@Loser66, you could have given the user an example matrix and its inverse to take the product of for demonstration purposes.

loser66 · Answer

@Hero, both 1 and I are answer, what should I do?

loser66 · Answer

because 1 = I , right?

anonymous · Answer

^ @Hero  @Loser66  always helps me out and explains this is the first question he don't do that but he always does and will explain if you ask him to

hero · Answer

Negative, how can 1 be equal to the identity matrix?

loser66 · Answer

is not that 1 is 1*I ?

anonymous · Answer

yeah you were right it could of been C not 1.

loser66 · Answer

btw @Hero like what @musa19965  said, not all of students here want to know how the stuff works. If they don't want, what should we do? That's why I don't give out the explanation until they ask "How?" or "can you explain?" or "why?" . If they don't want to know, it's perfectly ok to me.

hero · Answer

1. According to Wolfram Alpha: http://mathworld.wolfram.com/MatrixInverse.html 2. The purpose of Open Study is to encourage and facilitate 'study' and learning. Keep in mind that when you respond to questions, you're not just responding for a specific user. You're also responding for other users who might look at this same question hours from now, a month from now or a year from now.

loser66 · Answer

@Hero  Thanks for reminding me the rule of the site. I am here for free!!