Key To the Practice Midterm

Problem 1

A.  -1/2 e^{-x^2} + C

B.  1/4000 ln|y/(4000 - y)| + C

C.  -xe^-x - e^-x + C

D.  2/9 (1 - 3x)^1/2 + 4/27 (1 - 3x)^3/2

Problem 2

2

Problem 3

6(ln37 + 2ln82+ 2ln145 + 2ln226 + ln325)  = 234

Problem 4

550,000

Problem 5

0.12