請問第22題怎麼解？

6 xq erk R= 6 (D)6 '5 4 (Dies Cable-6) 15 2 564 +36-44 = 114-14 . A -> 2 -3x²4 16.() 4ABC” • Ex ZC = 105° • ZB = 30° • AC = 6 JAMBU simbol 17.04)設(-3.6)、816-6),則與 4 同方向的單位向量為何? (A)(3) (B)(3) (COG) ) 643)(-6) (91) 岩) 中中3 18. (設画x+y+8x-6y-1=0之圓心為(a,b),半徑為c,則a+b+c= (A)13 (B)9 (C)5 (D)1 19.( )在坐標平面上,若直線L通過兩點4(2.0),B(a,5),且直線的斜率為2,则a=? (A)2 (B)1 (C)2. (D)3 yout Hi (w} 44-3 20(D)若不等式 -3. + 25 的解為x2 a, <b,則20 + 36 =? (A)2 (B)-1 (C)1 (D)0 A2 B1 (533 21.CADEA,B,C BFHEER 4(-1,2), B(3,-1), C(2,6) BU|AB + BC+C = ? (A)5(2+2) (B)10(15+1) (C)5(V2 + V3) (D)10(+3+2) 22.( )+2x–5x2 – 3x + 4 = a(x + 2) +b(x+2)+c(x+2)+d fc=> SV (A541 B)34 -11 D)-26 () 0.9 (34) )若=(x++ b+2) c+ (A)(B(C)(D ) 23.(C)設(x)=(x-2x' + ke? 5)的各項係數和為-8,則k =? (A)-4 (B)4 (C)-2 (D)2 1-2-5tk = -8 Gik & -3x+123 -3X66 2018( 总 3 則。 ? 1/2 2

看不懂第一題的敘述

國立中興大學附屬高級中學 110 學年度第1學期期末考高二數學科試題(數 A) 命題:張老師 審題:孟 班級: 年 班 座號: 姓名: 試題共3頁,第 注意:請於答案卡(卷)上畫(寫)上正確身分資料, 若因未劃記書寫身分資料,或因劃記書寫錯誤,統一扣該科總成績5分。 9 2 一、單選題:(每題4分,共 12 分。請選出最適合的選項,全對才給分。) 9 o 0 1. 給定兩個向量與立,0為原點,如右圖。下面兩個表格是某個英文字母 的結構密碼,例如 B1(2, 3) 表示 OB = 2+3分。描出這些頂點的位置後 分別將表(一)與表(二)的頂點依照字母順序連起來(F 與O相連;C與 41 相連),即O-A-B-C-D-E-F-0相連,與 A1-B-C1-A1 相連,試問是哪一個英文字母。 (1) A (2) E (4) K 2 IN (3) F (5) Y O(0, 0) | D(50) A(1, 0) | E(6, 0) B(1, 2) | F(0,6) C(3, 2) 4,(1,3) B1(2, 3) C1(1.4) Table 2.表(二) Table 1:表(一) (3, 0) (5,-2) 2. 已知A(5,-2)、B(3.r)、C(s, 2)為坐標平面上三點,0為原點。若「OB 在OA上的正射影」與「在 01 Inil?

請問第28行的by是“被”的意思嗎？ 謝謝

20 Um the chemicals used to manufacture and dye'? clothing. This regular +影 ini > th 25 Tuled rooms, filled with toxic' fumes 於庆白,什麼過不去。 大冰作的 and lengthy exposure is believed to make employees far more vulnerable full of 同时充滿 to serious health problems, and even terminal illnesses. + AC,比幹、更hig院 院所 Humans, however, undoubtedly aren't the only ones suffering 可可/中/民, It = humans because of “fast fashion.” The Clothing industry has long been one of 疑地 术 圣 the most polluting industries in the world, responsible for almost 10% 射-自由之一 產業 of all global carbon emissions. Moreover, as the demand for fast fashion 8 ases, the com increases, the environmental pollution caused by clothing manufacturers 排。 增加 環境的污染色內 is predicted to rise by more than 60% over the next ten years. But the 十、 被 烈酒 *一段時農 damage doesn't end once the clothing has been made. Another factor is 境。 十二日,N/Vers 5 TV 30 that, in order to keep up with fashion trends, consumers nowadays are to 將 志法治 in) FEET +V +/ 了成不良重工 為了 purchasing new items more frequently than ever before, and discarding so as to the = 項目 比另類繁 功 1 fashion ['fæſən] n. [ Uldienotot [] [時尚 5. Stylish [ stall] adj. 時髦的 6, devastating ['devəs tetıy] adj. $1 比

81怎麼證明

f at (c, f(c)) is parallel to the tanger 81. Proof Prove that if f is differentiable on (-00,00) and f'(x) < 1 for all real numbers , then f has at most one fixed point. [A fixed point of a function f is a real number c such a that f(c) = c.] = DA TT of Cvornica 81 to show that

圈起來的地方，為何講到連續性區間，括號就是中括號；可微分的區間就是用小括號啊？

:) THEOREM 3.3 Rolle's Theorem Let f be continuous on the closed interval [a, b] and differentiable on the open interval (a, b). If f(a) = f(b), then there is at least one number c in (a, b) such that f'(c) = 0.

求解21,22,38🙇 section1.3不用理他 equation 2.1.5是微分的定義式

(d) Use the definition of derivative to prove that your guess in part (c) is correct. 14-21 Find the derivative of the function using the definition of derivative. State the domain of the function and the domain of its derivative. 14. f(x) = 3x - 8 15) f(x) = mx + b 16. f(x) - 4 + 8x - 5x? (17) f(x) = x - 3x + 5 18. f(x) - x + V g(x) - 19- x? - 1 20. f(x) 21s(x) x2 2.x - 3 (hours) arger. The graph hat the battery purs). (r)? graph - a 22.) a) Sketch the graph of f(x) - V6 - x by starting with the graph of y # and using the transformations of Section 1.3. (b) Use the graph from part (a) to sketch the graph of f! (c) Use the definition of a derivative to find f'(x). What are the domains of f and f'? (d) Use a graphing device to graph f' and compare with your sketch in part (b). lo-TE 23. (a) If f(x) = x + 1/x, find f'(x). (b) Check to see that your answer to part (a) is reasonable by JE comparing the graphs of f and f'. 1 (hours) shows how 24. The table given tho hai

這大題求解

II、綜合測驗:20% There are only a handful of underwater hotels around the world. These 16. guests to do what few people ever dream of doing: sleeping underwater. Fish, of course, do this all the time, but to humans the thought of 17._one's head on the seabed isn't very appealing. That's because mammals like us 18. have sufficient air to breathe. 19. _ ever wondered, therefore, how sea mammals, like whales, manage to get their beauty sleep? A number of 20. have attempted to answer this question. They seem to suggest that whales make use of an 21. sleep technique known as “logging.” During "logging," whales are 22. to shut down just one half of their brains. This enables them to get some much-needed rest, and yet at the same time remain alert enough to regularly return to the surface of the water to breathe. 23._ another sea creature that makes use of “logging" to survive is the dolphin. _24. Whales, which can remain underwater for up to ninety minutes, dolphins need to breathe in fresh air above the surface every twenty minutes. Thus for them it's even more important to keep half their brains awake at all times. Logging helps them 25. this. At the end of the day, this is just another example of how human and animal sleep habits are different in strange yet wonderful ways- ( ) 16. (A) let (B) allow (C) make (D) have ( ) 17. (A) throwing (B) burying (C) laying (D) lying ) 18. (A) must (B) may (C) can (D) will ( ) 19. (A) Will you (B) Do you (C) Are you (D) Have you ( ) 20. (A) secrets (B) habits (C) studies (D) facts ) 21. (A) amazed (B) amazing (C) amaze (D) amazingly ( ) 22. (A) able (B) possible (C) capable (D) likely ) 23. (A) Just (B) So (C) Also (D) Yet ) 24. (A) As (D) Unlike ) 25. (A) achieving (B) achieve (C) be achieved (D) to achieving (B) TO (C) With V. 文意選填:10%(請忽略大小寫) A) in fact (B) however (C) amazing (D) standing (E) much Animals sleep in incredible ways. They don't need to lie in bed for hours like we do. Zebra phants, for example, can stay 26. while they sleep. This odd sleeping position comfortable, but it's 27. safer. Predators are always around to catch sleepy prey a phants, therefore, are only away in dreamland for around 3.5 hours a day. Zebras are reported a less. Giraffes, 28. sleep the least of any animal. An average of half an hour per day is hey need to survive in the wild. 29. they hardly ever sleep for more than five minutes af fost and for less than an hour a day?

急～這兩個式子求解釋 真的分不太清楚 為什麼一個要加負號一個不用

POIM cos (9070)=-sino sin (90+6)= cable ST R(0)

請問這題如何解？

Hib): GE) 做好做PERFECTI 設a、b、c均為正實數,able- c= 576,求a+2b+3c的最小值為 【99 國新) 答 12

請問為什麼紅線處會等於零

範例一 Let f(x) = fax +b x>1 x2 X<1 Find a and b such that f(x) is differentiable for all real number o 【逢甲理工) x-1 Sol:f(x)在 R內均可微,.. f(x)在 x=1處可微 f-'(1)=f+'(1) f(x)-f(1) f(x)-f(1) lim lim X-1 X-1 x2-12 ax + 6-12 lim = lim X-1 ax +b-1 2= lim x-1 lim (ax +b-1)=0 = a+b-1=0) ax +(1 - a)-1 =2> a=2 Ⓡ17 lim X-1 b=-- 1