n>=2のとき、Sn=S（n+1）- Sn としてはいけないのですか？

初項から第n項までの和 Sn が, Sn=n3nで表される数 一般項を求めよ。 Quick Master 初項から第n項までの和 S と一般項 α の関係を考えましょう。 n≧2 のとき よって Sn=a1+a2+....+an-1+an - Sn-1=a1+a2++an-1 Sn-Sn-1= an an Sn-Sn-1 また、定義から Si=α1 消える 次の C 解答 ≧2 のとき この公式を利用して、数列の和から一般項を求めることができま an=Sn-Sn-1=(n2-3n)-{(n-1)2-3(n-1)} よって an=2n-4 ... ① (n2-3n)-(n2-2n+1-3n+3)= また α=S=12-3・1=-2 ここで,① において n=1 とすると a=-2 よって, ① は n=1のときにも成り立つ。 したがって ◆n=1 を代入して成り立つことを観 an=2n-4 定 a=S-S1 でn=1とした値と α1が一致しないときは、n=1の場合 の場合に分けて答えを表しましょう。(→練習130 (2)) Quick Check 数列の和と一般項 数列 {an} の初項 α から第n項 an までの和をSとすると a1=S1, n≧2のときan=S-S1

解答がないので採点お願いします🙇🏻‍♀️

(1) Risa was a quiet junior high school student. She always enjoyed spending time in the school library, but she felt nervous when she had to speak in front of many people. This summer, however, something unexpected happened. An exchange student named Mike came from the United States to study at her school for two months. Mike was a tall, friendly boy who had never been to Japan before. (2) One day, her English teacher, Mr. Sato, said, "Risa, you are good at English. Would you please show Mike around the school this week?" Risa was very surprised. She had never spoken English with a native speaker, so she wanted to refuse. But Mr. Sato's kind smile made her unable to say no. "Okay, Mr. Sato," she replied. She knew she had to try. (3) Risa and Mike started spending time together. Risa found that Mike was really interested in Japanese traditional sweets, which are called wagashi. "My grandmother has made wagashi for over thirty years," Risa said. "She has a small shop near the station." Mike's eyes shone. "That's wonderful! Can we visit her shop? I want to see how wagashi are made." (4) The next Saturday, Risa took Mike to her grandmother's shop. Her grandmother, who was a master craftsman, kindly welcomed them. She showed them nerikiri, a type of wagashi that is easily ( )shaped into flowers or leaves. "These sweets are made from bean paste and sugar," she explained. Mike was surprised to know that such beautiful things were completely edible. "They are too beautiful to eat," Mike said, taking a picture of a sweet shaped like a morning glory. (5) Risa's grandmother showed Mike how to mix the ingredients and shape the sweets carefully. Mike was clumsy at first, but he learned quickly. Risa helped him and translated her grandmother's instructions into English. Thanks to the experience, Risa was able to speak English (イ) more confidently than before. She realized that teaching someone about her culture was a very enjoyable experience. She felt that the shy girl she had been was finally changing. 次の問いに答えなさい。 1. 本文第2段落の下線部 "unable to say no" と同じ意味になるように、空所に適する語を入れなさ い。 o She can't say no. 2. 本文第4段落の下線部 "were completely edible" を、能動態に書き換えるとき、空所に適する 語句を入れなさい。 (The chef) made completely edible. 3. 本文第5段落の下線部 "more confidently" が使われている文と比較級の意味が異なるものを、 ア~エの中から一つ選び、記号で答えなさい。 ア. Ken runs faster than Jim. イ. This bag is bigger than that one. ウ. The more I learn, the happier I am. エ This book is easier to read than the last one. 本文の内容に照らして、 次の問いに日本語で答えなさい。 1. 本文第2段落で、 理沙はなぜ英語の先生の頼みを 「断ることができなかった」 のですか。 佐藤先生が優しくんだから。 2. マイクが 「美しすぎて食べられない」と発言した時、 理沙の祖母はマイクに何を伝えましたか。 4段落) これらの和菓子はあんこと砂糖でできているとうこと 本文第5段落の下線部 (イ) had been が指しているのは、どのような理沙の状態ですか。 日本語 的に説明しなさい。 (イ) She felt that the shy girl she had been was finally changing. exchange student 交換留学生 refuse: 断る traditional: 伝統的な master craftsman 名人、職人 bean paste あんこ edible: 食べられる clumsy: 不器用な confidently: 自信を持って 次の下線部の日本語の意味に最も近いものを、アエの中から一つ選び、 記号で答えなさい。 (ア) shaped (第4段落) ウ ア. 色を付けられた イ. 洗われたウ. 形作られたエ. 割られた 静かで図書館で過ごすことを楽が、みんなの前で話術に緊張するという状態。 本文第4段落にある、 次の文を最も自然な日本語に訳しなさい。 • Mike was surprised to know that such beautiful things were completely edible. マイクはそのような美しいものが完全に食べられることに驚きました。

誰がこの機会を壊したのかは明らかだ。(日本語訳) it is clear who is the mastermind とit is clear who mastermind is の違いを教えてください

教えてください！見た感じどれもあってそうで…💦

問3. 以下の英単語の中からスペルの正しくないものを2つ選び、 番号で答えよ。 ただし、若い番 号順で解答せよ。 解答番号は[30] [31] (x2) ① longevity ② sanctuary ③ molequle ④ archeologist ⑤ masterpieace ⑥ acquaintance ⑦ postpone

<3>の問題についてです。参考書の訳が「来週の日曜日でイチローは、3年間神戸に滞在していることになるだろう。」なのですが、滞在しているではなくて、滞在したことになるだろうではだめですか？

master 習得する effort g (3) Next Sunday Ichiro will have stayed in Kobe for three years. <4> Written in easy Japanese, this textbook is good for school 0 children. 第1章 意味のカタマリ編

20の文、rest of usとはドユコト？

語句 家であるダロルド・トレッファートは述べる。 18 それ以降、まだ機能している脳 組織はすべて別の用途に使われる。 19 「その損傷を受けていない組織を通して(脳 信号の)再配線が行われ, それから,その領域内に秘められていた潜在能力が解 き放たれるのです。」 20 つまりサヴァン症候群の人は、他の人が使うことのできな い脳の部分を解き放っているのかもしれない。 関を で 15 It wasn't until ~ that SV. ~になって(やっと) SVした/cause引き起こ す / 16 condition 状態, 症状/18 tissue 名 組織 / repurpose 他の用途で使 う/ 18 rewiring 圈 再配線/ intact 形 無傷の/potential 名 (潜在的な) カ 19 文法・構文 16 as は, worsen という 「変化を表す動詞」 があることから「比例(~するに つれて)」の意味だと判断できます。 "文頭の what は, 疑問詞ととらえても関係代 名詞ととらえても OK です (和訳では疑問詞として訳してあります)。 19 potential は形容詞 「潜在的な」 が有名ですが,今回のように名詞 「(潜在的な) 力」 の意味 BOONで使われることがあります (前後に前置詞 of / within があることから名詞と判断 し、この意味を推測できればOKです)。 And 日本

関係詞の問題です。教えてください。よろしくお願いします🙇

下の日本語を参考に)に適当な1語を入れなさい。 (1)' ● Give me ( )you have in your hand. ② He made me ( ) 1 ( _) today. (2) ③ She has the ( )bag( ) I bought in Paris. ● That is the office ( your father works. (3 6 Tell me ( ⑥ You may eat ( 0 ( ⑧ ( ) the game was put off. )you like. ) comes during the next hour, tell them I'm out. ) hard you may try, you can't master English in a week. ① あなたが手に持っているものをください. ② 彼のおかげで現在の自分がある. ③彼女は私がパリで買ったのと同じバッグを持っている. ④ あれが君のお父さんが働いている会社だね. 6 その試合が延期された理由を教えてください. ⑥ 君は何でも好きなものを食べてよい。 1時間の間だれが来ようが私は留守だと言ってくれ ⑧ どんなに一生懸命努力しても, 1週間で英語を習 得することはできない。 === <先行詞を含む関係代名詞 the thing (s) which) < what を使った慣用表現> <関係代名詞の働きをする as> <関係副詞: 前置詞+関係代名詞と同じ働き〉 <先行詞を含む関係副詞> <複合関係代名詞 anything that> = <複合関係代名詞 (譲歩)=no matter who> <複合関係副詞 (譲歩) =no matter how〉

以前画像3枚目の様に修飾限定予告のthatというものを習ったので今回もその形なのかと思い、それらのと入れずに訳してしまったのですがこのthoseの識別は文脈判断ということでしょうか？ 教えて頂きたいです。よろしくお願いいたします。

実理 K The starting point for today's *meritocracy, of course, is the idea that intelligence exists and can be measured, like weight or strength or fluency in French. The most obvious difference between intelligence and these other traits is that all the others are presumably changeable. If someone weighs too much, he can go on a その人 →Heyで受けるのが一般的 5 diet; if he's weak, he can lift weights; if he wants to learn French, he can take a course. But in principle he can't change his intelligence. There is another important difference 原則として MV between intelligence and other traits. Height and weight and speed and strength and サフィス体例 関係性が強い文がくる even conversational fluency are real things; there's no doubt about what's being 間違いなん measured. Intelligence is a much murkier concept. Some people are generally (2) m2 Vogue 10 smarter than others, and some are obviously talented in specific ways; they're chess 天才 S masters, math *prodigies. But can the factors that make one person seem quicker than another be measured precisely, like height and weight? Can we confidently say that one person is 10 percent smarter than another, in the same way we can say he's 10 へんて、いつだっ S percent faster in the hundred-yard dash? And can we be confident that two thirds of 櫂へん 言いかえ 15 all people have IQs within one standard deviation of the norm that is, between 90 ように and 110 - - as we can be sure that two thirds of all people have heights within one standard deviation of the norm for height? Yes, they can, and yes, we can. besure least, are the answers that the IQ part of the meritocracy rests on. Those, at (3)-

訳例の『ことによると』はどこから来たんですか？perhapsですか？

Learning a foreign language is difficult. A simple statement, but perhaps it may reassure some of the billions who have failed to master another tongue that they are not necessarily subnormal.

不適切なものを選ぶ問題。 この問題の答えが上から順に 2 4 1 3 4 2 2 4 3 2 になるのですが、回答の根拠が知りたいです。全部じゃなくてもいいので力を貸してください（ ; ; ）

3 (1) The Eames Chair, designed by Charles and Ray Eames, has copied and sold worldwide over the decades. 11 2 (2) The cherry tree planted in front of my office was cut down because the construction of a new 2 building. 12 2 (3) Not only did Arthur Conan Doyle created the character Sherlock Holmes, but he also wrote about martial arts and skiing and then popularized them in Britain. 13 3 (4) J. M. W. Turner, who was interested in modern technology, expressed the speed, powerful, and 1 2 3 force of nature in his painting titled Rain, Steam, and Speed - The Great Western Railway. 14 (5) Since I am moving into a new apartment next month, I would like to buy some nice, stylish 1 2 3 furnitures such as a famous brand sofa or table. 15 4 (6) He cannot help crying, especially at the sad scene of the film which the dog, Hachiko, waits for his master at Shibuya Station during the heavy rain. 16 3 (7) The Department of Foreign Studies are temporarily located in the new building opposite the 1 main gate. 17 2 3 4 (8) Hiratsuka Raicho is best remembered for a monthly feminist magazine, Seito, the first 1 2 publication of whose came out in September 1911. 3 18 (9) Canals are artificial waterways, often constructed either to manage floods or to servicing water transport vehicles. 19 3 (10) Some bacteria cause infections, but a large number of others they are harmless as well as 1 2 3 helpful to people. 4 20