Are you sure it's afj, or is it more like ? Does square matrix of order two mean that it's a 2 x 2 matrix?
Given this problem:
In the square matrix «afj» of order two describe the position of the
elements. Where:
(a) i = 2
(b) j = 1
(c) i = j
This is an excerpt from my maths book. I do not understand what I exactly have to to do. Can you assist me with this one, please?
I would say: "The elements are in the second row of the matrix A with order 2 x 2."
Correction
b) where :
with element 2
with element 7
I must have slept to get this wrong...
The position of the elements would be: "the second column of the matrix A with order 2 x 2".
c where , so :
with element 2
with element 5
Why, isn't this right?
Or, does it mean where and where ?
Then, of course, it would be:
with element 2
The position would be: "the first column and row of the matrix A with order 2 x 2".
Is this right? I hope I am beginning to understand...
You've nailed part a. I think a statement such as "The elements are in the second row of the matrix A with order 2 x 2." is precisely what the problem is asking for. For part b, you've got the right idea, but not the correct details. It's not the second column, but the _______ column.
For part c, i=j by no means forces i to equal 1. What if i=j=2? So which matrix elements are those?
Oh, yes. Of course, it's the first column. My head must be somewhere, but not with me.
You're right. My presumption was false.For part c, i=j by no means forces i to equal 1. What if i=j=2? So which matrix elements are those?
and
because .
The position of the elements would be: "the row and column where the value of the row index equals the column index."
After writing it down it makes much more sense to me.
Oh, yes, I hope I get it right now.
OK.
Sorry for bothering you about this, but my Math book had no "Solutions"-part, where I could easily have looked it up.
Thanks again, Ackbeet, for your valuable help and enormous patience over me. I would really consider donating you money for your help, but I think I have to put that on my Someday list, because I'm a poor student from Paraguay.
The advice for writing things down is an excellent one, which I'll must keep in mind, but it was essentially part of the exercise.
Goodbye