Ookay i don't understand this at all...Sorry i forgot how to use LaTex to form matrices so bare with me...(adsbygoogle = window.adsbygoogle || []).push({});

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.

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Finding the matrix transformation of T

**Physics Forums | Science Articles, Homework Help, Discussion**