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The solutions to the math 201-203-re final exam held in fall 2009. It includes answers to various math problems involving integration, differentiation, logarithms, and series. The problems are labeled with numbers (1 to 17) and include both calculus and algebraic questions.
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Math 201-203-RE - Final Exam Fall 2009 Page 1 of 2
(1 a)
xฯ+ ฯ+
โ ln |secx| +
ฯx ln ฯ
โ x + C ; (1 b)
1 2
x
2
2
175 4
(1 d) 2 (
x + 4) โ 8 ln (
x + 4) + C = 2
x โ 8 ln (
x + 4) + C
(1 e) โx
2 cos x + 2x sin x + 2 cos x + C ; (1 f) ln |x| โ
3 x โ^ 2 ln^ |x^ + 4|^ +^ C
(2 a) factor then F39 or complete square then F26: ln
โฃx^ + 2 +^
x^2 + 4x โ 5
(2 b) substitution then F12: โ
1 12
ln
x
2 โ 1
x^2 + 5
x
y
g(x) = x
2 โ 2 x
f (x) = 4x โ x^2 + 8
โ 1 0 2 4
12
โ 1
b
b
b
b
Area =
125 3
โ 41 .67 square units
(4 a) point of equilibrium: (2, 44)
(4 b)
p(x)
x
p = x
2
p = 48 โ x^2
P.S.
C.S. 44
8
48
0 2 6.
b
b
b
b
(4 c) P.S.=37. 33
(5) 6.6705 ; (6 a) y =
1 5
x^5 +
1 4
e^2 x^ +
1 2
x +
15 4
; (6 b) y = x ln x โ x + 6
7(a) y =
3
3 4
x โ 3 ln(x) + C ; (7 b) y = C
x^2 + 1 ; (8 a) about 25 persons ; (8 b) about 5.4 weeks
Math 201-203-RE - Final Exam Fall 2009 Page 2 of 2
(9 a) โ
1 6 ; (9 b)^ โโ^ ; (10 a)^ โโ^ , divergent ; (10 b) converges to^ โ^
3 2
(11 a) a 5 =
25 5
, a 6 =
29 6
, a 7 =
33 7
, a 8 =
37 8
; (11 b) an =
4 n + 5
n
; (11 c) converges to 4
(12) the first 6 terms are: 1 , 3 , 5 , 7 , 9 , 11 ; an = 2n โ 1 ; (13) an = (โ1)
n+1 n!
5 n
(14 a) ยฑ
5 3
, divergent ; (14 b) converges to 1 ; (15) $2188. 10
(16 a) divergent by n.T.T. ; (16 b) convergent by geometric test to
9 2 ; (17) $1975.^90