MATH 152 Midterm: MATH 152 TAMU Exam 1b Solutions 2018a
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Here are the multiple choice answers for version b. Figures for problems 2, 7, 8, 9, 16, 17, 18 are at bottom right. e x. 1 ex1/2 dx = 2r 4: so r 4, the lines intersect when x = 8. 1 a 2 rh dx = r 8. 1: now r tan3 x sec3 x dx = r (cid:0)sec2 x 1(cid:1) sec2 x sec x tan x dx. = r (cid:0)sec4 x sec2 x(cid:1) sec x tan x dx = 1: the work done lifting the block is 25 100 = 2500 ft-lb. The total work done is 2500 + 2500 = 5000 ft-lb. So r xe 4x dx = 1 or f (x). Thus r 2: let u = x and dv = e 4x dx. 16 : via hooke"s law, f = kx or 10 = k (5 2) whence k = 10. 0 xe 4x dx = f (2) f (0) = 9.
