MAC 2311 Midterm: MAC2311 S97 Test 2

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31 Jan 2019
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Instructions: do not write your answers on this paper, use separate answer sheets. To receive credit, you must show all work. You are not required to simplify your answers. (1) (10 pts. ) Find a value for a that makes the function continuous f (x) =(sin x. A cos x if x 0, if x > 0. (3) (10 pts. ) Verify that f (x) = x3 + 5x2 3x 1 has a root between 0 and 1. (4) (10 pts. ) Analyze the global behavior of each rational function f de ned below. If the graph has a horizontal asymptote, give its equation y = c. if the graph has no horizontal asymptote, nd cxk such that f (x) cxk for |x| large. (a) f (x) = 7x8 x3 + x + 1 (b) f (x) = x7 3x4 + 1. This is the graph of y = f (x): y. Sketch the graph of y = f (x). (6) (15 pts. )

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