MATH 151 Midterm: MATH 151 TAMU Y2009 2009a Exam 3b
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Instructions: in part 1 (problems 1 11), mark your responses on your scantron form using a no: For your own record, mark your choices on the exam as well. Collected scantrons will not be returned after the examination: calculators should not be used throughout the examination, in part 2 (problems 12 15), present your solutions in the space provided. 2: di erentiate the function f (x) = xsec x, 0 < x < /2. (a) xtan x(cid:18) tan x (b) xsec x(cid:16) sec x x x. 1 cos x: compute lim x 0 (a) 2 (b) 0 (c) 2 (d) 1 (e) does not exist, a bacteria culture starts with 500 bacteria and after 3 hours there are 9000 bacteria. Find an expression for the number of bacteria after t hours. (a) (500)16t/3 (b) 18t/3 (c) 16t/3 (d) (500)18t/3 (e) (500)18t.
