f(x,y)=(2/sqrt(x^2 + y^2 -4)) - 1

1. describe the domain & range of f, and provide graph of the domain. be sure to use shading and dashed or solid curves as approriate.

2. draw a level curves for the values c=0 & c= 1. Be sure lable your axes to indicate the scale, and graph the equation f(x,y) = c, you will want to rearrange the equation to put it in recognizable form. (hint: get variables out of the denominator and elminitae the radical.

3. determined any y-intercepts of f. write answers as ordered triples and not round any of the coordinates.