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Key to the Practice Final Problem 1 A. a) yes b) yes c) 2 + (y - 4)1/3 d) 2 + [(x - 2)3 + 4 - 4]1/3 = 2 + [(x - 2)3]1/3 = 2 + x - 2 = x. e) No Symmetry B. a) yes b) no c) NA d) NA e) y-axis symmetry Problem 2 A. {x| x not 2} B. (-1,1) U [3,infinity) Problem 3 -2(x + 3)2(x2 + 1)(x2 - 2x - 1) Problem 4 (x2 - 1)/(2x2 - 4x - 6) Problem 6 A. (2,18) B. (0,10) C. (5,0) and (-1,0) |