What I did:The linear system in x,y:
has a unique solution precisely when:
The determinant of the matrix cannot be zero so:
Hence the answer is d).
I have a nagging feling about that though....
I know that for a transformation to be linear:Let be given by:
which of and is a linear transformation?
d). none of them
applying these, is the only linear transformation so the answer is b).
Can someone check these answers?