MAC 2311 Midterm: MAC2311 S95 Test 2
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Instructions: write your answers on separate answer sheets, not on this paper. Name (1) (10 points) a radioactive substance decays exponentially. Describe the intervals on which (a) f is increasing, (b) f is decreasing, (c) f is concave up, and (d) f is concave down. (4) (10 points) figure 4 shows the graph of y = f (x). Sketch the graph of y = f (x). (5) (15 points) consider the function f (x) = (cid:26) x2. T (c) f (x) = x2 + 21 x4 (7) (5 points each) evaluate the limits: (a) lim x 0 sin 2x x.
