Let

,g:R^(2)->R^(2)

linear function such as\

g(1,2)=(2,2)

and

g(2,-1)=(-1,2)

\ (I) Find the exact formula

g(x,y)

\ (II) Examine if

g

is

1-1

and if so,\ find g

^(-1)

.

Let g:R2R2 linear function such of g(1,2)=(2,2) and g(2,1)=(1,2) (I) Find the exact formula g(x,y) (II) Examine if g is 11 and if so, find 91