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159E2-S2010

159E2-S2010 - MA 15900 EXAM 2 SPRING 2010 1 Find an...

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MA 15900 EXAM 2 SPRING 2010 1 1. Find an equation of the line that passes through the point A (6, 3) and is perpendicular to the line y = 2 5 x + 2 . 1) y = 5 2 x 3 2 2) y = 5 2 x + 27 2 3) y = 2 5 x + 24 5 4) y = 2 5 x + 27 5 5) y = 2 5 x + 36 5 6) y = 5 2 x 3 2 7) y = 5 2 x + 27 2 8) y = 5 2 x + 18 9) None of the above 2. Find the domain of the function f . f ( x ) = 2 x x 3 9 x 1) ( −∞ ,2] 2) (0,2] 3) [2, ) 4) [2,3) 5) ( −∞ , 3) ( 3,2] 6) ( −∞ ,0) (0,2] 7) [2,3) (3, ) 8) ( −∞ , 3) ( 3,0) (0,2] 9) [ 2,0) (0,3) (3, ) 3. Which of the following are true of the function f ( x ) = 4 x 2 ? I. f has a y - intercept at (2,0) II. The range of the function is ( −∞ ,4] III. The graph of f is decreasing on the interval ( −∞ ,0] 1) I 2) II 3) III 4) I and II 5) I and III 6) II and III 7) I, II, and III 8) Cannot be determined 9) None of the above

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