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數學與統計 大學

大一公衛系微積分,求第二題解

公衛系 微積分期末考 (28/12/2018) 1. Use the Laplace transform to solve the differential equations. (1) j(t)+2y(t) = x(t), y(0)=1, x(t)=10, t20 (20) (2) Intravenous glucose is a treatment. Disposed at a fixed rate k grams per minute inputs into the blood, while blood glucose will be converted to other substances or moved to another place, at a rate proportional to the amount of glucose in the blood, the proportionality constant is a (a> 0), the initial amount of glucose in the blood is M. A. Find the variation in the amount of glucose in the blood (15) B. Determining the equilibrium, the amount of glucose in the blood. (5) = 2. SI Epidemic Model : The size of the population, n+1, remains fixed. Let i(t) be the number of infectives at time t, and let s(t) be the number of individuals who are susceptible. Given an initial number of infectives iO), we would like to know what will happen to i(t). SI Epidemic Model is described by the differential equation. di(t) = k·i(t).s(t) ......(5.1) dt i(t)+s(t)=n+1 i(0)=i, (1) Solve this differential equation of the SI Epidemic Model (5.1). (10 h) (2) What is the peak times t of the epidemic spread? (10) 3. Consider the Two-compartment physiological models and is shown in figure 1. C1 (t) represent the drug concentration in the first compartment and C2 (t) represents the drug concentration in the second compartment. Vi and V2 represent the compartment volume. Use the first order linear differential equation general solution to solve the C1 (t) (20 ) and use the Laplace transform to solve C2 (t). 【20 分). | 世」!()

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商業與管理 大學

會計一第二章 這題每一項的翻譯麻煩完整寫給我我 譬如為什麼這時後要加這時候要減 我真的不會!拜託各位大神解!

Pre P2.4 (LO 4) The trial balance of De Bortoli Co, shown below does not balance, De Bortoli Co. Trial Balance June 30, 2020 Debit Credit $ 3,340 $ 2.812 1,200 2.600 3.666 1.100 Cash Accounts Receivable Supplies Equipment Accounts Payable Uncarned Service Revenue Share Capital-Ordinary Dividends Service Revenue Salaries and Wages Expense Utilities Expense 8,000 800 2,480 3,200 810 $12.522 $17.486 that şi eu Each of the listed accounts has a normal balance per the general ledger. An examination of the ledger. and journal reveals the following errors. this 1. Cash received from a customer in payment of its account was debited for $580, and Accounts Receivable was credited for the same amount. The actual collection was for $850, V2. The purchase of a computer on account for $710 was recorded as a debit to Supplies for $710 and a credit to Accounts Payable for $710. ✓ 3. Services were performed on account for a client for $980. Accounts Receivable was debited for $980, and Service Revenue was credited for $98. X4. A debit posting to Salaries and Wages Expense of $700 was omitted. 第二 X 5. 5. A payment of a balance due for $306 was credited in Cash for $306 and credited to Accounts Payable for $360. 76. A dividend of $600 cash was debited to Salaries and Wages. Txpense for $600 and credited to Cash for $600. Instructions

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英文 高中

請問為什麼第二題錯了?🙏🏻🌞

高中英文綜合應用(上)-閱讀測驗、文意選填、克漏字、翻譯寫作、作又跟 閱讀測驗實戰練習 題組) The brain, which weighs less than 2.2 pounds, is perhaps the C 03. Wha some responsible fror (A) (B) (C ( Part 1閱讀測驗、文 Part 1 閱讀測驗、文意選填 complicated organ in our bodies. Although scientists have not been able to solve all the mysteries of this amazing organ, they have made for learning, memory, and language. Recent studies indicate that the two progress. They have found that certain parts of the brain are halves of the brain -- the right hemisphere and the left hemisphere play extremely important roles in learning and communicating. The left hemisphere deals with rules, lists of information, and short-term memory. In contrast, the right hemisphere deals with feelings, colors, and term memory. Scientists recognize the importance of both hemispheres in individuals learn languages. They believe that some learners use one half Scientists now relate left and right hemispheres to the way different of their brains more than the other half. Left-brained learners usually long- 04. the learning of all sorts, including language learning. A. repetition to learn. Right-brained learners look for a general picture and concentrate on relating new information to what they already know. They use associations and intuition to learn. Most people fall into one of these types. If teachers know whether their students are left brained or right-brained, they can help them learn better. (D) 01. Which of the following statements is TRUE? (A) Most people are left-brained learners. (B) Scientists have solved all the mysteries of the brain. (C) Language learning takes place only in one hemisphere. (D) Left-brained learners are good at learning grammatical rules. (A) Q2 . Which is the best title of the passage? (A) The Amazing Human Brain (B) A Recent Scientific Discovery (C) Short-Term and Long-term Memory (D) Discoveries in the Two Hemispheres 8

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數學 高中

根本看不懂啦\( ̄▽ ̄;)/

Your report should follow these guidelines, although you may choose how you present it: How to Write a Mathematics Report In writing your report, remember that you are writing up a mathematical story and so, like all good stories, it will need a beginning, a middle and an end. More formally, the main components of this writing style are: Introduction, Formulating the Problem, Solving the problem, Discussion of Results, and Conclusion. We will now consider some of the detail in each of these aspects. Introduction This is the beginning of the story. Give a brief explanation of what the problem is about what the goals of the report are and what will be presented. Assume that your reader does not know what the problem is about or how to solve it. Formulating the problem Translate the situation into a maths problem. Explain how you will begin to solve the problem and break it into simpler stages. Discuss any assumptions made. What quantities are variables and which values are fixed? You may use sub-headings if they assist you. Solving the Problem Show any calculations and mathematical reasoning that you use. (Assume that your reader does not know much maths). Do not show the same types of calculations repetitively. Just give one or two examples of a calculation and then put the rest of the results in a table. Use diagrams or graphs if they assist you. Make general remarks about what you observe in your calculation results and, possibly, why. You may want to criticise your work and go on to improve it in the next section. Explain what you will do next and why. Discussion of Results - Evaluate and Verify Summarise your results if necessary and refer to your mathematical reasoning. Justify procedures used. Interpret your results. First, are they reasonable or does something not look right and need further investigation or checking? Is there a decision to be made? Here is where you should present the decision-making process. Evaluate the strengths and limitations of your solutions. Conclusion Summarise your findings. Refer to the problem outlined in the introduction. Make sure that you answer the question that was asked. Make recommendations. No new material should be presented here.

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