(3) Let f (as) = m2'\"'+1 + a3: + c where a

(3) Let x + ax + c where a < 0 and n is a positive integer. (a) Fill in the gaps. (i) lim 00 (ii) lim (b) Determine whether or not f is a continuous function. Explain. (c) Find the interval(s) where f is increasing or decreasing. (d) Show that f crosses the x-axis only once. 1