Question 1 - Infinite Sequences.
(a). Determine an infinite sequence that satisfies the following .
. .
(i) An infinite sequence that is bounded below, decreasing, and convergent
(ii) An infinite sequence that is bounded above and divergent
(iii) An infinite sequence that is monotonic and converges to 1 as n → ∞
(iv) An infinite sequence that is neither increasing nor decreasing and converges to 0 as n → ∞
(b). Given the recurrence relation an = an−1 + n for n ≥ 2 where a1 = 1, find a explicit formula for an and determine whether the sequence converges or diverges
(c). Find a explicit formula for an given that {an}∞ n=1 generates the infinite sequence 1, − 1 9 , 1 25 , − 1 49 , . . . Does the above infinite sequence converge or divergence?
In: Advanced Math
6.
For this problem we will use the fact that:
?????? = ??????? − ????
? ? = ? ? − ?(?)
A company produces and sells copies of an accounting program for home
computers. The total weekly cost (in dollars) to produce x copies of the program
is ? ? = 8? + 500, and the weekly revenue for selling all x copies of the program
is ? ? = 35? − 0.1?).
a. Find a function, ?(?), for the profit of producing and selling x copies.
b. How many programs must be sold each week for the profit to be $1200?
c. How many programs do they need to sell to maximize their profit? What is
the maximum profit?
In: Advanced Math
Question 2: AHP
A tourism company want to evaluate four hotels and select the best
one using four criteria project's COST, CLEANNESS and DISTANCE and
SIZE of the HOTEL. Assume that the company prefers; cleanness two
times more than size, cost two times more than distance, and
distance 1.5 times more than size.
Criterion |
|
|
|
|
||||
Cleanness |
Very good |
|
excellent |
average |
||||
Cost ($) |
200 |
175 |
250 |
190 |
||||
SIZE of rooms (m2) |
15 |
12 |
20 |
25 |
||||
Distance from Downtown (km) |
0 |
4 |
2 |
7 |
1. Calculate the weights of each criteria
2. Generate the pair-wise comparison of hotels based on each
criterion using the scale of Saaty (1-9)
3. Calculate the score of each hotel based on each criterion
4. Calculate the score of each hotel. Justify the best selection
for the company.
5. Calculate CI, and CR. What does the value of CT means?
In: Advanced Math
c) Let R be any ring and let ??(?) be the set of all n by n matrices. Show that ??(?) is a ring with identity under standard rules for adding and multiplying matrices. Under what conditions is ??(?) commutative?
In: Advanced Math
In: Advanced Math
There was a maths tutoring organisation called Pony Lovers’
Maths (PLM), which provides tuition for children in school-based
mathematics by using ponies as the basis for most of the
calculations. This business is a not-for-profit social enterprise.
The classroom will house a maximum of 7 people at a time (6
children and 1 teacher) for 3 hours each work day (5 days per week)
during school term and holiday periods, but NOT on Public Holidays
(10 working days per year). That is, 50 weeks per year.
Part of the workplace health and safety (WHS) requirements to
operate is to make available toilet facilities. Also, the Child
Protection Act 1999 of Queensland1 requirement is to require for
all children to be supervised while that present on the premises.
Although there are toilet facilities in another building about 100
metres away in another building, the teacher needs to remain with
the other children. Consequently, PLM needs to consider the cost of
building a toilet within PLM complex. The classroom and 2 stables
has a total roof area of 16 metres long by 6 metres wide. The full
roof area is used for collecting rainwater that fills a 25,000
litre tank. There is no other source of water for the building. The
Toowoomba Regional Council does not provide sewerage to the site
due to its distance away from the city. The building has
solar-generated electricity that is backed-up by the electricity
grid when the solar panels are not in use at night.
OPTION 1: to build a water closet toilet (the type of toilet
normally used in Australian buildings). Because there is no
sewerage provided by the council, a septic system (provided by
eco-safe waste water treatment) would need to be purchased and
installed for $12,500, and the cost of running the electrical pump
is around $30 per year (based on non-solar sources). The Eco-safe
system is treated by J & K Wastewater services for $250 each
year, plus an average of $60 each year for replacement parts and
maintenance. The water from this wastewater tank is not suitable
for drinking but can be used to irrigate the paddock and generate
grass growth. This will reduce the amount of money needed to buy
packaged horse-feed, to the value of $225 per year on
average.
The link below gives further information.
https://www.ecosafe.com.au/
OPTION 2: to build an Earth closet toilet; a self-contained
self-composting, 4 chamber toilet at a cost of $2,254. The system
uses a 12 volt/5 Watt fan to keep odours away. This 5 Watt per hour
fan runs at all times, and is charged at 30 cents per KWh during
the 12 hours of night when solar panels are not operating.
Installment also requires the installment of an odour vent pipe
($80 cost plus $100 to install) and an underground drain and gravel
pit for draining the liquid waste ($600 total cost of digging,
gravel, parts plus installation). The gravel pit must be maintained
and not have any additional soil over the pit, which will reduce
the usefulness of this area of land. Professional maintenance will
cost $200 each year.
In addition, you will need to include the cost of one pack of
“Nature Quick Microbes” at $18 for each chamber of the system.
These Microbes will need to be added to each chamber twice each
year. You will also need 2 bottles a year of “Nature Flush Enzymes
concentrate” for $33 each. The link that describes more about this
system is given below. (You should select the 4 chamber option to
see the price of $2,254 for “Nature Loo Excelet with Chamber
Screen” in the link in Footnote 2, below)2:
Statistic
Element
January
February March April
May June July
August September October
November December
Mean rainfall (mm) for years 1869 to
2007
132.1
121.1
94.6 61.9 58.4
56.8 52
39.5
46.7
72.2
89.5
120
Other Information is Below:
Litres per sq. metre of roofing for 1mm of
rain
1
Sq. metres area of
roof
96
Monthly drinking water usage for horses (Litres (L)) 3200 L
Other water usage per month (Litres
(L))
1000 L
Water usage Per Year for flushing toilet in Waste Water System
35,000 L
Rainwater tank capacity (Litres
(L))
25,000 L
Beginning volume of rainwater as at 1 October (Litres (L))
70%
17,500 L
Using the accepted rainwater collection ratio of 1 millimetre (mm)
of rainwater creates 1 litre of rainwater collection per square
metre of roofing and PLM’s buildings floor area is 96 square
metres, calculate the potential average monthly rainwater
collection assuming there is an average monthly rainfall of 79
mm.
2. Calculate the costs to set up each of the 2 toilet system
options AND to run the system for the first 12 months after
installation.
(5 marks for water closet system; 5 marks for Earth closet system =
10 marks)
In: Advanced Math
Find the characteristics and characteristic coordinates, and reduce the following equation to canonical form:
for y>0 only
Uxx+yUyy=0
In: Advanced Math
An operation called the logical implication, is written as x → y and corresponds to English statements “x implies y” or “if x then y”. The implication operator outputs 0 if the first operand is 1 and the second operand is 0, and outputs 1 otherwise.
1. Imagine a gate that implements the logical implication operator. Is this gate a Universal Gate (i.e. can any arbitrary combinational function be implemented if you had an infinite supply of gates that implement the logical implication operator)? If it is, write the expressions for NOT and OR, ∼ x and x|y in terms of this implication operator. In your expressions, use the character sequence -> to represent this operator, i.e. x → y is repesented in plain text by x -> y.
2. Simplify the following boolean logic expressions that make use of the logical implication operator → into simplest possible expressions that you can (in terms of the constants 0 and 1, and the variables present in the given expressions), while only making use of the three standard boolean logic operators ∼, & and |.
• (a → b)&(a →∼ b)
• (a → b)|(b → c)
• (a|b) → (a&b)
In: Advanced Math
Consider Sturm-Liouville problem
−u`` + q(x)u = λu , x ∈ (a, b),
u(a) = 0, u(b) = 0.
please can you find the eigenvalues and eigenfunction?
In: Advanced Math
1. Draw a 3-D sketch of the pallet unit load on a wood pallet. Include dimensions for a box and the pallet unit load.
2. Show your calculations for the quantity of boxes in a unit load.
3. Show your calculations for the number of pallets per trailer load.
4. Show your calculations for the quantity of boxes per trailer load.
5. Explain why these results are important to a producer who ships goods to customers by freightliner.
Box dimension: 12” x 10” x 6” O.D. Pallet dimensions: 48” x 42” x 6” Constraints: (1) No pallet overhang (2) Pallet unit load <= 48” high, including the pallet, for storage in a rack system Trailer dimensions: 53’ long x 8’ 6” wide (b/w the hinges) x 9’ high
In: Advanced Math
In: Advanced Math
Analyticity of trigonometric functions (a) Directly from the definition, construct the Taylor Series centered at x = 0 for the function f(x) = cos(x). (b) Show that this series converges for all x ∈ R. (c) Show that this series converges to cos(x) for all x ∈ R.
In: Advanced Math
DIRECTIONS: Show all the work in the space provided. Box the final answers, and follow the indicated directions.
y"-3y'+2y=e^xsinx
In: Advanced Math
The graph of a function
y = g(x)
on the domain
−8 ≤ x ≤ 8
consists of line segments and semicircles of radius 2 connecting the points
(−8, 0), (−4, 4), (0, 4), (4, 4), (8, 0).
(a) What is the range of g?
0 < y < 60 ≤ y ≤ 4 0 ≤ y ≤ 20 < y < 40 ≤ y ≤ 6
(b) Where is the function increasing? (Select all that apply.)
−8 ≤ x ≤ −2−2 ≤ x ≤ 22 ≤ x ≤ 44 ≤ x ≤ 8−8 ≤ x ≤ 8
Where is the function decreasing? (Select all that apply.)
−8 ≤ x ≤ −2−2 ≤ x ≤ 22 ≤ x ≤ 44 ≤ x ≤ 8−8 ≤ x ≤ 8
(c) Find the multipart formula for y =
g(x) if
if −8 ≤ x ≤ −4 | ||
if −4 ≤ x ≤ 0 | ||
if 0 ≤ x ≤ 4 | ||
if 4 ≤ x ≤ 8 |
(d) If we restrict the function to the smaller domain
−6 ≤ x ≤ 0,
what is the range?
0 ≤ y ≤ 62 ≤ y ≤ 6 0 ≤ y ≤ 42 ≤ y ≤ 40 ≤ y ≤ 2
(e) If we restrict the function to the smaller domain
0 ≤ x ≤ 4,
what is the range?
2 ≤ y ≤ 40 ≤ y ≤ 2 0 ≤ y ≤ 64 ≤ y ≤ 60 ≤ y ≤ 4
In: Advanced Math
Find an optimal parenthesization of matrices whose sequence of dimensions is: <5, 10, 12, 5, 50>. Please write out both the m[·, ·] and s[·, ·] tables.
In: Advanced Math