(a) Think about what makes the fraction undefined. What value(s) of x makes the denominator 0?
(b) Notice that the function has a vertical asymptote. Substitute points around the vertical asymptote to find out if the range is (−∞,∞), (−∞,0),(0,∞),[0,∞), or (−∞,0].
(c) Notice that the function has a vertical asymptote. Substitute points around the vertical asymptote to find out if the range is (−∞,∞), (−∞,0),(0,∞),[0,∞), or (−∞,0].