画像の赤矢印の部分の変形がわからないので教えていただきたいです！

Example 41***** 初項1, 公比2の等比数列を,下のように第1群に2個, 第2群に4個、第 ・と,第ん群に含まれる数の個数が2k 個となるように群に ****** 分ける。 1, 24, 8, 16, 32|64, (1)第1群から第3群までに含まれる数の総和を求めよ。 (2)第に群の最初の数を求めよ。 (3) 第群に含まれる数の総和を求めよ。 解答 (1) 群に分ける前の数列を {a} とすると an=2n-1 初項から第3群の末頃までの項数は 2+4+6=12 よって, 求める和は,等比数列{a} の初項から第12項ま [類 16 立命館大] Key 各群の初項や末 項が,もとの数列の第 何頃か考える。 での和であるから 1-(212-1) 2-1 = 4095 答 (2) k≧2 のとき 初項から第 (k-1) 群の末頃までの項数は 2+4+......+2(k-1)=2/(k-1)k=k-k 2 よって, 第ん群の最初の項は,もとの数列の第 (k2-k+1) 項 であるから. 求める数は ak2-k+1=2(k2-k+1)-12k2-k 答 Support 第群の初 項は,第 (k-1) 群の末 項の次の項である。 (これはk=1のときも成り立つ) (3)(2)より,第ん群に含まれる数の総和は,初項22-k, 公比 2項数 2kの等比数列の和であるから 2k2-k.(22k-1) 2-1 = 2k2k22k-1) 答

(1)なぜshouldになりますか？どちらも入ってもおかしくなさそうです。助動詞の確信度の違いではwould＞shouldだったのでwouldを入れましたが間違えていました。

Complete the sentences using one of the verbs in the box. Add should/shouldn't or would/wouldn't. 1) Is George here yet? Not yet, but he here soon. He has just called me. 2) My house was near the sea. In summer, on sunny days, we 3) You 4) You've been working hard all day. You a rest. for a swim. coffee before you go to bed. It will keep you awake. to his advice. be drink go listen take 5) Mark got angry because his son

exercise s1教えてください！

7 Not having finished her homework Lucy is still ン Exercises 1 Fill in the blanks so that each pair of sentences will have a similar meaning. Use "done," "not V-ing," or "having done." b enitte e.g. As I was shocked at the news, I didn't feel like eating anything. Shocked at the news, I didn't feel like eating anything. 01 1. Jack was given a bad grade, so he had to take extra lessons. Jack had to take extra lessons. 9 2. My sister wasn't busy, so she asked if she could go shopping with me. , my sister asked if she could go shopping with me. 3. Kate has visited many tourist sites, so she can give you some useful advice. Kate can give you some useful advice. 4. We had lunch at the cafeteria, and then we went back to the library. , W we went back to the library. T (2) Tell your classmates about something you did on the weekend. Use "done," "not V-ing," or "having done." e.g. Not having any plans on Sunday, I took a walk along the river. Having walked for two hours, I came across some fisherman cooking ayu over *charcoal. Te

問2のｑ’の式の分母に2かけてるのはどうしてですか

この日, もつことになる。 がαより引き継がれやすいと, 世代を重ねるごとに変動をしながら, Aの遺伝子頻 度が大きくなる傾向になると考えられる。 153 問1 BB の個体: 36% Bbの個体: 48% bbの個体: 16% 問2 0.29 問3 41個体 Key Point 自然選択が働くと、特定の遺伝子型の個体が取り除かれ,ハーディー・ワインベルグの法 則は成り立たない。 解説 問1 遺伝子Bの遺伝子頻度をか. 遺伝子の頻度をg (p+g=1) とすると,この集団に おける遺伝子型の頻度は次の式で求められる。な (pB+qb)²= p²BB+2pqBb+q²bb とは いる。 よって, 遺伝子型 BB の個体の割合は2=0.62=0.36, 遺伝子型 Bb の個体の割合は2pg=2×0.6×0.4=0.48, 遺伝子型 66 の個体の割合は4=0.4=0.16 となる。 問2bbの個体がすべて取り除かれた後の, 対立遺伝子の遺伝子頻度を′とすると. BBの個体の割合が 0.36, Bb の個体の割合が 0.48 であったので(sp+Mo 0.48 g′'= (0.36 +0.48) ×2 0.48 0.84×2 =0.285≒0.29 となる。 変化後の遺伝子頻度で自由交配が行われれば, ハーディー・ワインベルグの法則から次 世代における遺伝子頻度は変わらないので,bの遺伝子頻度は0.29である。 問3 対立遺伝子の遺伝子頻度が0.29 なので, bb が取り除かれた後の対立遺伝子Bの 遺伝子頻度かは、 al p'=1-0.29=0.71 st Bb の個体の割合は2pg′=2×0.71×0.29=0.4118 ≒ 0.41 総個体数が100個体であれば,B6の個体数は100×0.41=41)

36番解説お願い致します🙇‍♀️数Bです！

27 (1) -5, 10, , 36 次の等比数列 {a} の一般項を求めよ。 ただし, 公比は実数とする。 (1)* 第2項が6, 第4項が54 (2) 第3項が20,第6項が160 P.16

なぜこの答えなのかほかの答えではダメなのか教えてください。お願いします🙇‍♀️

Select the best answer to complete the sentence. Then choose the letter (A), (B), (C), art 1. Before --- ------ (A) enter 2. He ------- Japan, all international students must get a student visa. (B) entering (C) to enter (D) have entered in psychology in university, but now he is an artist. (A) majored (B) studied 3. Mr. Toda helped Cathy describe (A) hers (B) she (C) researched (D) took research plan. her (D) herself

この解答であっているのかそしてなぜほかの答えではだめなのか教えて頂きたいです。

Part 5 Daily Life Incomplete Sentences Select the best answer to complete the sentence. Then choose the letter (A), (B), (C), or (D). 1. All participants have to arrive ten minutes before ------- scheduled appointments. (A) they (B) their (C) them (D) themselves 2. At the book reading workshop, authors read books ------- to children. Text Completion Select the best answer to complete the text. Then choose the letter (A), (B), (C), or (D). Questions 9-12 refer to the following notice. Security Notice by Artist Request The use of cellphones, cameras, smart watches or recording devices will not be permitted during tonight's performance. Guests are encouraged to leave these items in their home or vehicle to entry. Failure to comply with this ------ your 11. 9. policy will result in ---- from the venue without a refund. We greatly. 10. (A) fully (B) aloud 3. We are pleased to (A) welcoming (C) noisy (D) over ------- a new exchange student from Canada. (B) welcome (C) welcomed (D) welcomes 4. Use this robot vacuum cleaner after reading the ------- carefully.A.2 (A) systems 5. The order can -------- (A) ships (B) policies anywhere in the world. (B) to ship (C) applications (C) be shipping (D) be shipped 6. Steven began a bakery more than 20 years ------- (A) last (B) ago (C) past cooperation in creating a phone-free viewing experience. ------ 12. Thank you for your understanding. Central Theater directions A 9. (A) once (B) when (C) advance (D) prior (D) before 10. (A) remove 11. (A) anticipate (B) removing (C) removal (D) removed (B) acknowledge (C) acquire (D) appreciate 12. (A (D) automate Further details about this policy can be found on our website. (B) Come celebrate our 25th anniversary this Saturday from 5:00 P.M. (C) For information on group rates and private events, check online. (D) Check for details to see if you qualify for exclusion to this rule. 7. The air conditioner we bought was designed to turn off -------. (A) automatic (B) automatically (C) automated 8. The Momo Store also has small items you can ------- as souvenirs. (A) replace (B) borrow purchase (D) sell

この選択であっているのかそしてなぜほかの答えではダメなのか教えていただきたいです。

Education Text Completion Select the best answer to complete the text. Then choose the letter (A), (B), (C), or (D). Questions 9-12 refer to the following web page. Part 5 Incomplete Sentences Select the best answer to complete the sentence. Then choose the letter (A), (B), (C), or (D). 1. Before ------- Japan, all international students must get a student visa. (A) enter (B) entering (C) to enter (D) have entered ------- in psychology in university, but now he is an artist. 2. He A majored (A) hers (B) studied (B) she 3. Mr. Toda helped Cathy describe 4. It has been 15 years since I graduated (A) on (B) in 5. Library accounts are automatically created, so no ------- LVU Campus Tours The students of Las Vegas University are at the heart of the LVU experience, 9. tour our campus, meet LVU students, and have them guide you on a campus tour. You can enjoy a candid conversation with 10. students, ask them about classes, housing, Las Vegas, online student support, and more. 11. Doing this will hopefully give you the best idea of what LVU life would be like for you. The two-hour campus tour allows you to experience firsthand everything you need to know. Click here for your guided tour. (C) researched (D) took research plan. (C) her (D) herself ------- university. (C) at (D) from registration is 9. (A) so 10. (A) now (B) then (B) modern (C) initials (D) initialed 12. (C) also (C) latest (D) and (D) current necessary. (A) initially (B) initial 6. I'm happy to have this ------- to study with such great professors. (A) notice (B) benefit (C) factor 7. Statistics is a ------- class for second-year students. (A) require (B) required (C) requiring 8. The geologists plan to study the soil from the mountains Dopportunity (D) requires ------- Canberra. 11. A We will match you with a guide based on your interests and goals. (B) Feel free to ask about other universities found in the area. (C) Take the time to learn more about the city of Las Vegas online. (D) Please let us know the kind of person you were in high school. 12. (A) arrange (B) to arrange Carranging (D) arrangement (A) out (B) next (C) onto (D) around

例題(2)～(4)の意味がわかりません。教えて欲しいです🙇🏻‍♀️🙇🏻‍♀️

例題 7 イオンの生成と電子配置 23 ~ 29 (a) 下の記述にあてはまる原子はどれか。 次の (a)~(f)から1つずつ選べ。 (b) (c) (e) (d) (f) 118 02 2A 90 000 (1)電子2個を受け取り, ネオン Ne 原子と同じ電子配置になる原子。 (2)陽性が強く, 1価の陽イオンになりやすい原子。 (3) 電子配置が安定で,化合物をつくらない原子。 (4) 価電子が7個で, 陰性が強い原子。 KeyPoint 原子がイオンになると, 貴ガス (He, Ne, Ar など)と同じ電子配置をとる。 センサー ●原子が電子を受け取っ たり,失ったりして生 じる単原子イオンの電 子配置は,貴ガスと同 じになる。 解法 原子では,電子の数は原子番号に等しいので, (a) 7N, (b) 80, (c) 9F, (d) 11 Na, (e) 14Si, (f) 18Ar (1) ネオンは, K殻に2個, L殻に8個電子がある閉殻構造。 (2) 1価の陽イオンになると, Ne と同じ電子配置になる。 (3) 電子配置が安定→価電子の数が0で, 貴ガス。 (4)電子1個を受け取って, Neと同じ電子配置になる。 解答 (1) (b) (2) (d) (3) (f) (4) (c)

この問1なんですが起こった順に並べるのに 小説を書く過程が選択肢に入っていてこれは後半に来るのは何故ですか？また、こんなひっかけは共通テスト出でる可能性はありますか？ すいません、語彙力ないしみにくいがぞうですが お願いします🙇‍♀️

が での 第3問 第3問(配点9) Your creative writing teacher has encouraged you to write a short story. You have found a posting on a British website which has some good advice. [MD] Getting Ready to Write (well) I've been writing articles as a freelance writer for years, but I had never 問10 円 135 written fiction. For pleasure I taught myself to write short stories and finally finished my first novel! If you feel like writing your novel too, here are a few tips. Preparing to Write 1.5 teach oneself S する tip Read (a lot!) Summarise ideas Outline Create realistic characters ✓ 区 1-7 I. summarise ~をま とめる 2.8 outline あらすじ