MATT ALONGI, JOHN COURSEN, STEPHANIE BUCAHNON, KASEY
CHUISANO
MA 118
Quiz 2
Do not bother to algebraically simplify the derivatives you compute.
I need
one quiz from each group.
Designate one member to hand the quiz in.
I just
need the answers though in 6 and 7 the details are part of the answer.
.
Make
sure the names of all group members appear on the answer sheet.
Due by
June 20, midnight.
1) Assume the value of a car is a linear function of time.
When new the car
is worth $15,000; 20 years later the car is worth $1,500.
How much will the
car be worth 7 years after purchase?
ANSWER: y = $10,275
2) Find the domain and range of
f(x) =
2
4
x

domain = X >
2, X <
2
range = Y >
0
3) Solve the equation: 4x
3
+ 3x
2
 4x  8 =
0,6.557,8.0693
4) Compute
2
lim
→
x
2
16
4


x
x
=
8/0 or undefined.
5) Compute:
4
lim
→
x
4
2


x
x
lim sqr(x) – 2 / x  4 = .25
x
4
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View Full Document6) Compute the derivative of f(x) = 2x
2
 5x + 3 directly from the definition.
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 Summer '07
 Nelan
 Calculus, Algebra, Derivative, lim, following function.

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