51題，解答九分之一那邊，為何是cot3x的三次方而不是一次方，為何是九分之一不是三分之一？

Finding an Indefinite Integral In Exercises 49–58, find the indefinite integral. Use a computer algebra system to confirm your result. 49. cot 2x dx 50. tan Soor foset X X sec4 4 4 dx 51. csc4 3x dx 52. cores X X cot? csc4 – dx 2 2

A 1.75-kN·m torque is applied to the solid cylinder shown. Determine (a) the maximum shearing stress, (b) the percent of the torque carri... 繼續閱讀

50 mm 25 mm 1.75 kN.m

除了打勾的那幾題不用問，其他的題目都不會，今天幫我解答

lol V-ling(現在分詞)+情狀副詞 = be V+情狀副詞+ V-ing (現在分詞) 動詞+受詞+情狀副詞 = 情狀副詞+動詞+受詞 動詞+介系詞+受詞+情狀副詞 = 情狀副詞+動詞+介系詞+受詞 動詞+情狀副詞+介系詞+受詞 例2 The little girl runs slowly Bill is dancing happily. = Bill is happily dancing. » Jack ca He walked into the room quietly. = He quietly walked into the room. sister looks at me. ( 0 My sister - He chatted with me happily. = He happily chatted with me. = He chatted happily with me. 2. Mir sister looks 練習 圈出正確的答案(可複選) 1. 2. | and 傷心地看著遠方。 Allen 3. He is aprofessional Swimmer, so he can (Swim fast); fast Swim), (is shouting loudly; is loudly shoutingl; loudly is shouting). The baby girl (cried sadly; sadly cried) for her kitten's death, Most sudents in the library read quietly : quietly read) for the entrance exam. The disabled (walked slowly); slowly walked) on the street. He to the teacher 4. and looked sadly 每天在課堂上都仔細聽老師上 I listen 5. 6. 7. 他纸下午一點半的時候狼吞虎 He was eating 「她很冷淡地看著我。 ; 8. cut the paper carefully cut carefully the paper : carefully cut the paper Mom (looked at me coldly; coldly looked at mes boked coldly at me May (walked the dog slowly : walked slowly the dog : slowly walked the dog Ella does her homework quietly : does quietly her homework : quietly does her homework). 10. They happily listened to the song : listened to the song happily: listened to happily the song : listened happily to the song). 9. h WARAT q She looked atr 我們可以輕易地完成這個作 We can finish : 我爺爺每天早起且開心地 練習 依提示作答 My grandfathe 1. Ted /watch TV/ py / last night 學生 力讀英文

還是想不通 請幫幫我

3-1 條件機率與獨立事件 2 core Gooooo BE / | | || 5x 4x z to d袋子裡有3顆白球,2顆黑球,由甲、乙、丙三人依序各抽取1顆球,抽 取後不放回, 若每顆球被取出的機會相等,請問在甲和乙抽到相同顏色 球的條件下,內抽到白球之條件機率為何? To 2 1 (A) ); B) (B) (D) (E) 2 5 配合例題2 子抽一支, 12 © C亦為獨立 1 上,

第一行是怎麼變第二行的 求解

+ 。 +4y=cos 2x y- ancoszx+Ctinet +cosrx +4 29 may 14. 團隊專題方法之比較、聲明 只要可行,就應使用特定數迷,因爲它 * +9y = csc 3x 較為簡單。就以下問題,以參數變異法與 y" – xy' – 3y = x2 其做比較。 41' + 5y = e2x csc x Yp=-cosex Sineklarat dx + sinax Scorex dx s z yen 合 & cosex + 2xsinux truh (X) ruft cash CPMSG-=(x)dh dx

請問這樣證明是對的嗎

3章 - E 如圖,AABC的三條中線AD、BE、CF 交於G點, 求證入AFG 面積 合AABC 面積。 6 "El com •C TE= EC :SABE- OBEC SAEG=0 GEC SABE - OAEG=GBCC - OGEC - ABG=OBG E D :SABE ABECITA HAABE: ABEC (la ) E = ÉC .E8% 中影 SAEG OEG 、、: HB AAEG OGECCB 1 ) 入FAC、ABC 等高 三角形重心與面積 OFAC = OBFC CB a F :昨-% SAFG OF B G H 局 如圖,AABC中,AD、BE、CF為三條中線,G點 1. Apts , A BEG (8点点) () AGB 面積=ABGC面積-ACG 面積号AA-Afrome 3 OAFC = OBFC (2) AGF 面積=ABGF面積=ABGD 面積=ACGD A FC - AFG -813FC - ABFG-GAGC=SBQ =ACGE 面積=AAGE 面積 AABC 面積。 COAGC=0 BGC=A ABG is ABG = 1/3 o ABC 每個人皆相等 FB SAF G 13FG F8 :: SAFG - OBFG Core $ ..AAFG = 1 SPBG A ABG - ABC & GABG = 0 ABC = AFG = 1 SABC 2 - 1

SCENARIO 8-3 To become an actuary, it is necessary to pass a series of 10 exams, including the most important one, an exam in probability... 繼續閱讀

21題 教教我QAQ

Section 11.3 Angular Momentum J-s behind rmv a he ur 265 = ? a ter 30. Example 11.1: A 58.1 Iw COMP string and whirled at 18. Express the units of angular momentum (a) using only the funda- momentum of magr mental units kilogram, meter, and second; (b) in a form involving the circular path. Fir newtons; (c) in a form involving joules. marw horizontal and (b) the 19. Use data from Appendix E to make an order-of-magnitude esti- 31. Example 11.2. A stai mate for the angular momentum of our Solar System about the Max 27 the end of its lifetime galactic center. mu = 17.293 of radius 4.96 X 10' 20. A gymnast of rotational inertia 63 kg•m? is tumbling head over heels dwarf of radius 4.21 with angular momentum 460 kg•m?/s. What's her angular speed? 17.99 acted on the core, fine A 660-g hoop 95 cm in diameter is rotating at 170 rpm about its 32. Example 11.2: Astro 22. A 1.3-th-diameter golf ball has mass 45 g and is spinning at central axis. What's its angular momentum? L: 1W=0-66*(0-95) x 140x277.10 km and determin core that collapsed to 3000 rpm. Treating the golf ball as a uniform solid sphere, what's ing with a period of 4 its angular momentum? 18-3 33. Example 11.2. The s 10-598 rpm With her arms outstre Section 11.4 Conservation of Angular Momentum tational inertia is 3.5 23. A potter's wheel with rotational inertia 6.20 kg•m? is spinning (Fig. 11.6b), her rot freely at 20.0 rpm. The potter drops a 2.50-kg lump of clay onto her final spin rate? L = 6 2 x 2-1 = 12-99~13 - 2x2 22 13= 60.48)" x 2.5 W W = 2 . X z W = 20x2T 60 ²2.1 ~ 1 12.574

第21題 到底要怎麼寫ಥ_ಥ

Section 11.3 Angular Momentum J-s behind rmv a he ur 265 = ? a ter 30. Example 11.1: A 58.1 Iw COMP string and whirled at 18. Express the units of angular momentum (a) using only the funda- momentum of magr mental units kilogram, meter, and second; (b) in a form involving the circular path. Fir newtons; (c) in a form involving joules. marw horizontal and (b) the 19. Use data from Appendix E to make an order-of-magnitude esti- 31. Example 11.2. A stai mate for the angular momentum of our Solar System about the Max 27 the end of its lifetime galactic center. mu = 17.293 of radius 4.96 X 10' 20. A gymnast of rotational inertia 63 kg•m? is tumbling head over heels dwarf of radius 4.21 with angular momentum 460 kg•m?/s. What's her angular speed? 17.99 acted on the core, fine A 660-g hoop 95 cm in diameter is rotating at 170 rpm about its 32. Example 11.2: Astro 22. A 1.3-th-diameter golf ball has mass 45 g and is spinning at central axis. What's its angular momentum? L: 1W=0-66*(0-95) x 140x277.10 km and determin core that collapsed to 3000 rpm. Treating the golf ball as a uniform solid sphere, what's ing with a period of 4 its angular momentum? 18-3 33. Example 11.2. The s 10-598 rpm With her arms outstre Section 11.4 Conservation of Angular Momentum tational inertia is 3.5 23. A potter's wheel with rotational inertia 6.20 kg•m? is spinning (Fig. 11.6b), her rot freely at 20.0 rpm. The potter drops a 2.50-kg lump of clay onto her final spin rate? L = 6 2 x 2-1 = 12-99~13 - 2x2 22 13= 60.48)" x 2.5 W W = 2 . X z W = 20x2T 60 ²2.1 ~ 1 12.574

急！求救 #6 8 9 如果需要酬勞可私下談 （ex.$70題）

pie participation in informal 6.The National Science Foundation (NSF) sponsored a study on girls' science, technology, engineering, or mathematics (STEM) programs. The results of the study were published in Cascading Influences: Long-Term Impacts of Informal STEM Experiences for Girls (March 2013). The researchers sampled 174 young women who recently participated in a STEM program. They used a pie chart to describe the geographic location (urban, suburban, or rural) of the STEM programs attended. Of the 174 participants, 107 were in urban areas, 57 in suburban areas, and 10 in rural areas. a.Determine the proportion of STEM participants from urban areas. b.Determine the proportion of STEM participants from suburban areas. c.Determine the proportion of STEM participants from rural areas. d. Multiply each proportion in parts a-c by 360 to determine the pie slice size (in degrees) for each location. e.Use the results, part d, to construct a pie chart for geographic location of STEM participants. f.Interpret the pie slice for urban areas. g.Convert the pie chart into a bar graph. Which, in your opinion, is more informative? 7. All high way bridges in the US are inspected periodically for structural deficiency by the FHWA. Data from the FHWA inspections are compiled into the National Bridge Inventory (NBI). Classify each variable below as quantitative or qualitative. a. Length of maximum span (feet). b. Number of vehicle lanes. c. Toll bridge (yes or no). d. Average daily traffic. e. Condition of deck (good, fair, or poor). f. Bypass or detour length (miles). g. Route type (interstate, U.S., state, county, or city) 8. The NBI data were analyzed and the results made available at the FHWA Web site. Using the FHWA inspection ratings, each of the 608,272 highway bridges in the US was categorized as structural deficient, functionally obsolete, or safe. About 13.5% of the bridges were found to be structural deficient, while 3.5% were functionally obsolete. a. What is the variable of interest to the researchers? b. Is the variable of part a quantitative or qualitative? c. Is the data set analyzed a population or a sample? Explain. d. How did the NBI obtain the data for the study?