這題我的算法是右邊的，這樣算跟答案不一樣，想問錯在哪裡（左邊是詳解的算法）

7. 有一數列<a>,已知其前 n 項的和S, =q+a2+...+a=n²+3n-2,若數列 2+2x b₁ = α₂-α₁ bz-03-02 = b3-04-03 ' (b)=(a+-a) b₁ +b₂ + ··· + b₁₁ = (17-1) 17-2 24 22 ) (X) Al₁ = S11 - S10 + bio = 911-910 =(152-128)=24 =(121+33-2)-(100+30-2) (錯誤) An= Sn-Sn =2n+4 bn = An+1 - an = 2(n+1)+4-2n-4 = 2 bittblo = 2× 10=20 •b₁++bio = a11-a₁ =24-2=22

求解3.4.5謝謝🙏🏻

Who lives in a pineapple under the sea? SpongeBob SquarePants _1_, along with Squidward, Gary, Patrick, Sandy, Mr. Krabs, Plankton, and Karen the computer wife. Created and designed by Stephen Hillenburg, SpongeBob is one of the world's most lovable characters. Before working for TV channel for children, Hillenburg 2 marine biology at the Ocean Institute in California in the 1980s. It was while working there that he first came up with the idea which ____3___ eventually become SpongeBob. It has always been difficult to figure out if SpongeBob is a teenager or an adult. In one episode, however, viewers get a glimpse of SpongeBob's driver's license and it clears everything up-sort of. It says SpongeBob's birthday is July 14, 1986, which means he 4 thirteen when the show hit the air in 1999, and he would be well over 36 by now. Another fun fact revealed: SpongeBob's hair is listed as "yellow," which means he 5 have hair. The color is the exact same color as the rest of his body. In other words, he isn't just a solid mass of bald yellow sponge. (A) do (B) does (C) have BAI. A2. (A) used to teach AB (A) has CA4. ADS. (A) must be (A) does 166) (B) may well teach (B) had (B) had been (B) needs (C) was used to teaching (C) will (C) could have been (C) might (D)has (D) couldn't help teaching (D) would (D) has to be (D) shall

想問第3題，為什麼不能選其他選項?答案是D

in 3 S a ve ying fertilizer," bees are an essential part of our ecosystem. Numerous and other bugs that spread pollen. Though it may sound far-fetched, bees are indeed However, bees around the world have been i 2 closely related to 1 in large numbers since the 1970s. Human activity has negatively impacted natural habitats of many species, one of them the natural habitat of bees.ap aretoanothid@gy and - Yet the alarming rate in 3 bees are disappearing suggests an even more severe crisis the Earth is going through, namely, ecological imbalance. When a healthy biodiversity is compromised, the delicate balance of nature will be upset thus putting more and more species 2 extinction. They do 4 electri Amish homes havbild and managed are essential P bees that ensure the reproduction of thousands of wild plant species and 85% of all cultivated crops. The 5 in wild bee populations might follow, or even be more pronounced than that in insect populations. e forcinga mich c Then, many animal populations are faced with the problem of decreasing drastically. in and the Mog of the uniquen ABO (B) earth origins These 1 (A) human survival becom source of Torino (C) artificial intelligence lizzo moi (D) social morality nodis A facities are gradually gover 2 (A) dying off (B) paying out noia (C) turning down blo anlands (D) calling back and Q3 A) Amish ause of Tener Monique (B) whose yldizzd (C) what (D) at which om OS B ms. (D) in terms of w 4 (A) in charge of 122 (B) at risk of dur (C) on grounds of us (B) greed 5 (A) trauma ban (C) decline (D) format ghol of the many endangered species. They have that

第20題怎麼看

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為什麼是a呢

(C)真相不一定跟多數人站在同一邊 (D)集體錯覺是一種約定成俗的默契 3 「曾經有一位詩人說過:『科學乃理智的兒子,詩歌乃感情的女兒。』其實,豈止詩 歌是感情的女兒,一切扣人心弦的文藝作品,莫不是感情的女兒。抒情的詩句當然 是,而抒情的散文亦是。因為,抒情的散文乃抒情詩的延展,抒情的散文寫至精純 處,二者的界限往往混淆莫辨了,是散文,也是詩,是詩,也是散文。」 根據上文,下列敘述何者最貼近文意? (A)作者認為優秀的抒情散文,文字帶有詩意而情感精煉 (B)科學與理智都是陽剛的存在,詩歌與感情則是陰柔的表述 (C)作者評論現代詩與散文的界線模糊,比不上古典詩的扣人心弦 (D)要寫出好的抒情散文,必須先寫出精純的抒情詩,詩是散文的基礎 4 "生物多樣性』(Biodiversity)一詞在1986年被提出,為生物的多樣性(Biological diversity)簡稱,在學術上的定義擴充及所有生態系中活生物體的變異性,它涵蓋了 所有從基因、個體、族群、物種、群集、生態系到地景等各種層次的生命型式。另 外,廣泛定義上亦指各式各樣的生命相互依賴著複雜、緊密而脆弱的關係,生活在 不同形式的人文及自然系統中,也就是人和萬物生生不息在地球的生物圈共榮共 存。而『生物多樣性』本身具有生態與經濟、科學與教育、文化、倫理與美學等價 值。」) 根據上文,下列敘述,最符合「生物多樣性」狀態的是:

剩下的有人會嗎ಥ⁠‿⁠ಥ

班级企一甲 Prefix 1. re- 2. un- 3. im- 加在6mp開頭前 4. ir- 在開頭前 5. in- 6. dis- 7. mis- 8. inter- 9. pre- 10. over- 11. under- 12. super- 13. anti- 學號 |||1204042 Meaning again /back hot / no not / no not/no not/no not /no 姓名 羅紫家 Examples redo () rewrite() unhappy uncomfortable (AR) impossible impolite (7) irregular irrelevant (AR) insecure (9) informal (#₂)

請問這題為什麼不能用過去式

題2分,得 題2分,得分: 分)且 *) biove 部的一套 illed or = struck ern part tens of es and f ed the mental 02 更好 es. 2.搜救隊設法救出許多受困的人,而緊急醫 療隊為傷者提供必要的救命照護。配發 Search-and-rescue teams have managed to save many trapped people, and emergency medical teams have provided essential life-saving care for the injured. 或: Search-and-rescue teams have successfully freed individuals who were trapped, and emergency medical teams have given vital life-saving attention to those who were injured. 翻譯要點 a. manage to V 設法(完成/做到) 2. 搜救隊設 Search and re zake t take a trip to Sweden. 小蘇設法存夠錢去瑞典旅遊。 b. trap [ traep ] vt. 受困 Sue managed to save enough money to 8 building. 那個男孩被困在失火的建築物內 .... (本句為過去分詞作形容詞用) ▶ The boy was trapped in the burning 二、英文 :依提 k:Ber 他 白 請注意

高一數學 直線與圓 請問這題怎麼解 或是解答的這個式子是什麼意思

a (√2-1)α =(√2+1)=(₁ ²2²² = ²√2²-²1 =3+2√2 直線與圓 6-C = PA ===== PAX====√2 b-c |三、填充題 y 10. 如右圖,8 個單位正方形排列在坐標平面上,另有一條過點(4,4) 和點(k,0)的直線將整個區域(8個單位正方形)分成面積相等的ip 8 兩部分,則此直線的斜率為了 √1 = y + x*; +x高发 30.工作 0 (k, 0) (4,4)

請問我第2小題哪裡寫錯了 感謝🙏🙏

範例 2 4x=12 有 10 筆變量X與Y 之數值資料,已知x+x+......+xo=120,yy+y+....…+yig=200, x+x+…… +xyp=3940,yº+y+…..…+yz=7600,x,y+x2+⋯+xiayio=4000,則: (1) X 的標準差為 So 。 (2)X與Y的相關係數為 最適 (3)以最小平方法求得變量Y對變量X之最適直線的斜率為 5 = 10 (4x+6²) 12² 2 (1) X ₁²³+ X2 ²³ + ... + X₁0² 6 = √250 = 5510 4 8 3. 15 985 187 15 Y: 11 Qibi+.... Qiobio (3) n.ox.by 4000 10.550.6510 m = Y. mr女 告 1) 3947 = 18 (144+6x²) 250=6x² 11 il 5% 01/00 2) 760p = 10 (400 + 6y²³) by byt: 360

請問為什麼第一題是practicable 而不是capable><

are one billion nanometers in one meter, you can get an idea of how impressive this technology really is! Even though this fabulous technology has been around for almost 100 years, we have only recently been able to experience both its benefits and i cogmignal ovil Asqa niso I e maoney but also area Stopesugar have characteristics These days, nanotechnology is used primarily to make things stronger, stiffer, and smoother. Due to their tiny size, nanoparticles increase the overall surface a of an object, and that acts to give the object special properties However, nanotechnology is also used in the field of biochemistry. One possible of nanotechnology in the future is in the field of robotics. It might be feasible for tiny nano-robots, or "nanobots," to be produced that could easily perform tasks in a very small scale. Each of these nanobots would be so small that you would need a special microscope to see them. Because of their small size, however, a great deal of them DEST OF 90 MOBST U simple math, inc ped programa Cindy a button nose Qué oyes, would be needed to perform a task. furod One drawback to nanotechnology is that the structures are so small that they pose some health and environmental risks. Because of their size, they can float around in the air and enter our lungs without our knowing about it. The effects of this are not yet known, but in the future, if the use of this sort of technology becomes more common, some specialists believe that we may suffer from various illnesses. Regardless of the risks, however, it seems that nanotechnology is something that will be with us for a long time. davol odi ni "11" nuomong ot D Tolo hazards. or (A) affordable (B) practicable (C) visible 14 What does the passage mainly discuss? (A) A new technol use 13 The boldfaced word "feasible" in paragraph two is closest in meaning to ghib10:56 Ap (D) capable