Practice Exercises. 1. Determine the domain and range of the following functions. (a) f(x.y) = 10 -27 + 5y (g) f(z.y, 2) = 3ry - yz + 2xz (b) g(x. y) = Vy -I (h) g(x, y. =) = \\50-1- - 1- - 23 1 (c) h(x, y) = (i) h(x, y, = ) = = + 1 (d) (z, y) = V - T- () p(r, y. =) = /4-12-12 (e) e(x, y) = V2+ 12 -9 (k) O(x, y. 2) = =tany + yet + clog, z (f) w(x, y) = COS U cty sing (1) f(x, y, z, w) = 24 W