- #1
mr_coffee
- 1,629
- 1
Ookay i don't understand this at all...Sorry i forgot how to use LaTex to form matrices so bare with me...
There is an example in the book that has:
v =
x
y
T[v] =
5x-y
4x - 5/2y
so, they said thus,
T[v] =
5 -1
4 -5/2
*
x
y
so they say:
A =
5 -1
4 -5/2
of T
which makes sense, but in the book first question:
T(v) =
3x -y
2y +x
A =
3 -1
1 2
what the heck? why isn't it
3 -1
2 1
Also there was another one:
T(v) =
y-x
x+y
A =
-1 1
1 1
why isn't it just
A =
1 -1
1 1
?
why did they switch the x and y? and in the example they didn't do anyhting different.
There is an example in the book that has:
v =
x
y
T[v] =
5x-y
4x - 5/2y
so, they said thus,
T[v] =
5 -1
4 -5/2
*
x
y
so they say:
A =
5 -1
4 -5/2
of T
which makes sense, but in the book first question:
T(v) =
3x -y
2y +x
A =
3 -1
1 2
what the heck? why isn't it
3 -1
2 1
Also there was another one:
T(v) =
y-x
x+y
A =
-1 1
1 1
why isn't it just
A =
1 -1
1 1
?
why did they switch the x and y? and in the example they didn't do anyhting different.
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