MATH-170 Midterm: MATH 170 Boise State f14 shortX2
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15 Feb 2019
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Instructions for part i: the rst four (4) pages are short answer, you don"t need to show work, partial credit will be rare, (8 pts. ) Assume that f is an unknown function of t, while a, b, c and k are constants. (a) (b) d dt (cid:16)t2f 2(cid:17) = dt (cid:18) at + b ct + k(cid:19) = d: (6 pts. ) Exact answers will score better than decimal approximations. Partial credit may be possible if you show your work. lim x 1/2 x ln(2x) Select the correct answer for each derivative below. (a) with y a function of t, nd d dt (cid:16) cos(t + y)(cid:17) = C: sin(t + y) + cos(1 + y ) D: (1 + y ) sin(t + y) (b) with r and h functions of t, nd. Two cars are traveling on perpendicular roads as shown at right. 50 mph, with car one approaching the intersection and car two moving away from it.
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