Question A. Find the domain for the given functions.. 1) f(x, y) =1/x + y

2) f(x, y) = 3xy/y – x^2

Question B. Find the range for the given function.

1) f(x, y) = e^x-y

2) lim
(x, y)--(0,0)
=x(cos y - 1)/x^3 + y^2

Evaluate the limit.