想問打問號的那題🙇🏻‍♀️🙇🏻‍♀️有比較快的方法嗎🙇🏻‍♀️

a 3. 9. 遺忘曲線(Forgetting curve)是用來表達長期記憶之遺忘的一種曲線,最早 由心理學家艾賓浩斯(Hermann Ebbinghaus,1850~1909)經由實驗提出, 如果不及時複習,這些記過的東西就會遺忘,且每個人的遺忘率不同。若小泰 每過1個小時,僅記得1小時前的三分之二的內容,請問 衣() (1)小泰一開始記了27個新的英文單字,3個小時後記得的新單字剩下幾個? 小時後記得的新單字剩下幾個? 27x29 (2)承(1),小泰幾個小時後記得的新單字會少於1個? A:9小時後27x(÷)=1

第13題怎麼算

附圖自行車競賽的賽道,以下信件內容是每位選手參賽前都會事先收到關於賽道的相關 資訊,請大家幫助參賽選手龍龍在比賽前完全掌握資訊,拿出最佳表現。 親愛的參賽者你好: 本次的賽道在坐標平面上為一個三次函數f(x),已知起點與終點分別為 S(-3,15)和E(1,-1),且起點與終點恰對稱於賽道的對稱中心,主辦單位在事先 場勘時從空中用空拍機拍攝時發現此三次函數的廣域特徵近似曲線y=-2x, 其中賽道上 4(0,k)為補給站,最後請各位選手到達終點時回答出通關密語 (a,b),優先抵達終點線且答對通關密語者即為本次的優勝者。 10. 此賽道的對稱中心為 (-1, 7) 11.請幫龍龍算出此三次函數為−2X-6X--2X+9 (非選擇題,6分) 。 通關密語問題: 此三次函數賽道在x=-2附近的局部特徵近似於直線y=ax+b,通關密語為(a,b)。 STEELS AFTER (2) 祝各位參賽者有個美好的經驗,期待當天與各位相見。 MEGETARIS SF(x) (0.8) 。 (非選擇題,4分) S -2x367²-6X+4X=2+4+7 -2x³²-6x² - 2x +90 12. 補給站的坐標位置4為 (09) (非選擇題,5分) 実二 $(非選擇題,5分)*y=a(x+1)+p(x+1)+7 13. 通關密語(a,b)為 (2,1) (非選擇題,5分)),10-20 。 解 This 買完一次后米售類(一)(HT012-16+2P+7 2(X+1)+4(x+1)+7=(-x)(m-zoP=41 E 主辦單位騰騰出版社 -341 15-4 = =) = (-1, 1) S (10-0-56-0 f(o) = -2+4+7 f(0) = 2 = 9

想問第二小題 謝謝！

2 2 3. 設w=cos二+isina,求: 5 5 (1) (2− w) (2— w²¹) (2−w³) (2-wª). 1 (2)1+1+++ 解 GET 1 @ @ 1 @ + @ O 來后,中二樓更

第三題求解

4.已知f(x)除以 ax+b 的商式q(x),餘式r(x),試回答下列問題: b (1)若f(x)除以(x+-),則商式= 餘式= la) a (2) 若cf(x) 除以 ax+b,則商式= 答 (3) 若f(二)除以x+b,則商式= a artb = get the for) =$ax+b)+(a) - form = (ata) (aveb) + Cr(r) aq (x) cf(x) (我) 餘式=(4) 餘式= Cr(x) r(2) 。 O

想問最上面那題的“keep”可不可以換成“stay”呢？謝謝🙏

Game 4.1 每天閱讀報紙是讓心智保持活躍和及時掌握時事的好方法。 current events great keep abreast of Reading newspaper every day is a active mind energnic and keep abreast of current events. 4.2 報紙上的填字遊戲和數獨(Sudoku)也是很好的腦力鍛鍊,可以讓人消磨時間。 ( keep the good way to stay your The crossword puzzles and Sudoku are also good mental exercise [ can let people killed time.] for in the newspaper <that allow people to kill time. have Collecting baseball cards 5.1 自從我成為棒球迷,我一直在蒐集棒球卡。 been -ing [Since I became a baseball fan] I continuely collectect

請問這題謝謝！（附答案）

SO HEL Example 3 Find y' if sin(x + y) = y² cos x. Solution : Differentiating implicitly with respect to x and remembering that y is a function of x, we get y' 日日 cos(x + y) (1 + y) = y²(- sin x) + (cos x) (2yy') (Note that we have used the Chain Rule on the left side and the Product Rule and Chain Rule on the right side.) If we collect the terms that involve y', we get cos(x + y) + y² sin x = (2y cos x)y' - cos(x + y) · y' y² sin x + cos(x + y) 2y cos x cos(x + y) - < 清除

求解

nogetheg xog 17. 一農夫想用 60公尺長的竹籬圍出一長方菜圃,並在其中一邊正中央留著寬2公尺的出入口,如右 圖示。此農夫所能圍成的最大面積為 256 平方公尺 289 平方公尺 zxy 工 Z -X-2 2公尺 64 6 9 21x14248 = A + MY 2 STATY 64 y x+y Z 2x+2y 时 32 32 64 64 2x+2y 32 32 64 2 1024 乙 2 Paxy 1024 ( 红网

這題求救🆘 求不出來☹️☹️☹️☹️

3. 若logets(−2²−5x+12)有意義,則x共有幾個整數解? (A) 2 (B) 3 (C) 4 (D) 5 +² X<-4 12 / ²x 3 2 3 (-+3)(x+4) > 0 1 1 4 8+3 log x+3 X+370 X> -3 X+-2 (2X + 3)(x + 4) >0 X= or-4 qu -4@303 2 (E) 6

求救第55題 完全看不懂他要我幹嘛

Year slenue Req) = 1932 1958 +1000 q R 9)=-1000q =74 1963 1968 COM If the price in dollars of a stereo system is given by 1000 p(q) + 1000, 1000 ² q where q represents the demand for the product, find the mar- ginal revenue when the demand is 10. 54. Profit Suppose that for the situation in Exercise 53 the cost in dollars of producing a stereo systems is given by C(q) = 0.2q2 + 69 + 50. Find the marginal profit when the demand is 10. 59. Marginal Product of Labor The output y of a manufacturing y process is a function of the size of the labor force n using the function 1990 +1000 1971 1974 = 990 197 197 19 19 1 y = kVn. The marginal product of labor, defined as dy/dn, measures the rate that output increases with the size of the labor force, and is a measure of labor productivity. (a) Show that (c) Using the a cubic f respond the rate and 200 (d) Discus descri part ( the y (e) Exp data calc ful x C(x) = 58. Money 1955-7 dy k dn an (b) How can you tell from your answer to part (a) that as the size of the labor force increases, the marginal product of labor gets smaller? This is a phenomenon known as the law of diminishing returns, discussed more in the next chapter. 56. Profit An analyst has found that a company's costs and rev- enues in dollars for a product are given by x2 C and R(x) 2x 2 5000' respectively, where x is the number of items produced. (a) Find the marginal cost function. (b) Find the marginal revenue function. (c) Using the fact that profit is the difference between revenue and costs, find the marginal profit function. (d) What value of x makes the marginal profit equal O? (e) Find the profit when the marginal profit is 0. (As we shall see in the next chapter, this process is used to find marimum profit.) A wher in bi find year (a) (C) (e) nad since

第二小題怎麼算呢

ty? 9 - 12 39 -1/2 0-12 12 o ||| 二 64-3,-1,-3) 野 (1,1,1) 21 - -2 -1 - -2 2 L th, sts) 29 ! 108,top 7108) (tofso 10. 空間中,已知A(6, -1, 1) B(4, -3, 0), (2, 1, 5)三點,試求 - 1.840 , 164+ 36 (1)通過A,B,C三點的平面方程式 - 3x+by+2 + A2) ABC的外心坐標。 5,3) n 11 AB XÃC AB 2 204 + ACCtih Ai (-2,-2, -1) x1-4, 2, 4) x+y +Z telo AB-1-2, 2-1) Get (1, 2, 3) $ -2,2,0 2x+2y-Z td -4 -3,- -ul -4 2 (0,217 104143 €d=0 to do te td- - 20 de of d = =) =X4Y1Z-Zo=0 - (-6, 12, 4) AL = 1-4, 2,4) – 12,-1,-2) (-3,6, 2) 16-y-224 de → 2X-4-22=2 2 -3x+by+zz td to 中(31 baik 【平面方程式-平面族】 ( -* de-2 - 16-18 totded: 30 1. 若平面E過 Eil:2x+3y-4=0 與 Ex:x-y+2z=0之交線,且與平面 3x+2y+3z=6垂直, [3,2,3) 求平面上之方程式為 1X + y + -42 -1 » + 1-8+2, 4+8,-448) 23