Find the range of f(x, y, z) = 1-x- y2 -z x +y + z 1; the set of points in rs not in the domain form a sphere of radius 1. range:(-, 0) u [1, o)

Find the range of f(X, Y, Z) = 1-x- y2 -z X +y + Z 1; the set of points in Rs NOT in the domain form a sphere of radius 1. Range:(-, 0) U [1, o)