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Fall 2005 Math 151
Week in Review - Solutions
− sin(ln t)
t
1
b.) h0 (x) =
x ln x
1. a.) f 0 (t) =
2x3
2x + 1
d.) *Use properties of logarithms to
simplify the expression.*
3
x
y0 = 2
−
x + 1 2(3x − 5)
−3x2
e.) f 0(x) =
(3 − x3) ln 2
10.
f.) f 0(x) = ln 9 sec2 (2x)3tan 2x
sin x
)
g.) y 0 = xsin x(cos x ln x +
x
11.
2
2. y = 3x − e
12.
ln 2
3. m =
4
13.
t
4. a.) y(t) = 4000(9 )
c.) f 0(x) = 3x2 ln(2x + 1) +
b.) 8320 bacteria
c.) t ≈ 43.95 minutes
5. 121.9 mg
6. y = 5e2t
7. y(2) ≈ 8.26◦
8. a.) Approximately 301.64 kg of salt
b.) approximately 30.41 minutes.
π
9. a.)
6
π
b.)
4
π
c.) −
3
π
d.)
3
e.)
3
5
1
1 + x2
2π
g.)
3
π
h.) −
4
i.) 0.4
π
j.) −
6
3π
k.)
4
√
2 8
l.)
9
1
y0 = √
2 x(1 + x)
√
π
3
(x − 1)
y− =
6
3
0 ≤ x ≤ 1, all real numbers.
π
2
f.) √
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