5. Is y = 2x (Inx) , concave up or concave down when x > 0? 6. lim ex-X - 1 = 7. (In x) dx = a) (x) In x + c b) 1/x + c c) In x + 1/x + c d) none of these1. Find y ' for each of the following functions: a) y = In (2x2 + 1) b) y = Ine? c) y = 3e (2x + 1) 2. Does y = xe" have any first order critical values? If so, where? 3. The number of items a new worker can produce daily after t days on the job is given by Q(t) = 150 -100 e - 4t When will he/she be able to produce 200 items daily? 4. a) y = In (3x2) is increasing for which values of x? b) Is concave up for which values of x