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数学 中学生

【規則性の問題】 規則性を見つけ、n番目の面積を みたいな問題での規則性の見つけ方がわかりません。コツなどありますか? 特に2枚目(2)は式を自分で思いつける気がしません。 高校では等差数列や等比数列などを学ぶという解答も見たことありますが、それを今どう使えるのかも分かり... 続きを読む

⑥6] 同じ大きさの正三角形の板がたくさんある。 これらの板を, 重 ならないようにすき間なくしきつめて、大きな正三角形を作り, 上の段から順に1段目 2段目3段目 ・・・とする。 右の図のよ うに、 1段目の正三角形の板には1を書き 2段目の正三角形の 板には、左端の板から順に 2 3 4 を書く。 3段目の正三角形の 板には、左端の板から順に 5 6 7 8 9 を書く。 4段目以降の 正三角形の板にも同じように,連続する自然数を書いていく。 たとえば, 4段目の左端の正三角形 の板に書かれている数は10であり, 4段目の右端の正三角形の板に書かれている数は16である。 このとき次の問い (1) (2) に答えよ。 ( 1 ) 7段目の左端の正三角形の板に書かれている数と7段目の右端の正三角形の板に書かれている 数をそれぞれ求めよ。 7段目の左端の正三角形の板に書かれている数( 7段目の右端の正三角形の板に書かれている数( (2) 2段目の左端の正三角形の板に書かれている数と n段目の右端の正三角形の板に書かれている 数の和が1986 であった。 このとき,nの値を求めよ。 ( ) 1 2段目 3段目 4段目 10 1 2 4 6 8 7 9 11 13, 15 12) 14 16 6【解き方】(1) 各段の右端の正三角形の板に書かれている数は, 1段目は1 (12), 2段目は4 (22),3段目 は 9 (32), 4段目は16 (42) ・・・・だから, 7段目の右端の正三角形の板に書かれている数は, 72 = 49 7段目の左端の正三角形の板に書かれている数は、6段目の右端の正三角形に書かれている数より1大きい数 だから, 62 +1 = 37 (2) n段目の左端の正三角形の板に書かれている数は, (n-1)2 +1 = n² - 2n + 2, n段目の右端の正三角形 の板に書かれている数はn² だから,n2-2n+2+n2=1986が成り立つ。 整理して, n2-n-992 = 0 左辺を因数分解して, (n +31) (n-32)=0n>0だから、n=32 【答】 (1) 7段目の左端の正三角形の板に書かれている数) 37 ( 7段目の右端の正三角形の板に書かれている数) 49 (2) 32 310081 IN まって、 Shore 201 GODE QUAT

解決済み 回答数: 1
英語 高校生

英語長文ハイパートレーニング③に載っていた長文です。右ページ3行目の文の文構造がよく分からないので教えて頂きたいです。特にas was to beの意味が分からないです🙇🏻

UNIT 8 出題データ 10 ●ワード数: 422 words ■難易度 : 難 解答と解説:本冊 p. 112~127 次の英文を読み, 後の問いに答えなさい。 school. As was to be expected in a country far less calm than the world imagines, Zurich's proposal has produced an uproar. În educational circles/it is argued that French will lose its strong position in German- speaking Switzerland (eight years of school French before entering the university at 19), and that/ this could endanger the political unity of Switzerland. /French-Swiss politicians are furious. Protests about the possible damage to the teaching of German in French-speaking Switzerland are more puzzling, because the German taught there is High German, the dialect of South and Central Germany. But in daily life, (3) as distinct from formal writing, Swiss-Germans speak one or the other of their very different dialects. Hence the liking for English as a "national link language."ids Dual The 26 ministers have hurriedly set up a committee, (naturally headed by a professor of French) to (4) work out a policy by the middle world with a better command of English. 運用能力 of this year. (5) It may well come up with wise recommendations At the moment, English is officially taught for only one or two years before the school-leaving age of 16. Changing such practices is enabling every canton to choose its own solution.) The Swiss are not never easy in Switzerland. There is no national ministry of education. 40 easily *regimented, drilgne vous von *[注] canton (スイスの) 州, 県 ■設問■ 1. Which one of the following best describes the main point of this article? Indicate your choice on your mark sheet. 目標解答時間 : 25分) Switzerland has a language problem. The trouble is not a shortage of tongues, for the Swiss have four of their own. Some 65% speak one 30 variety or another of Swiss-German, /18% speak French/ 10% speak Italian and nearly 1% speak one of the four Romansh dialects (u used in 5 some of the valleys in the *canton of the Grisons. There are also the languages of the many immigrant workers. The problem is that many て 35 Swiss parents, (1) not to mention businessmen who want to talk to M colleagues abroad, would like more Swiss children to (2) go out into the 同僚 The 26 cantons are independent in cultural and educational affairs. So 26 education ministers have to 独立している meet (in order to decide on 15 recommendations which, to become law, then have to get through 26 parliaments. That is why it took Switzerland more than 20 years to introduce teaching in a second national language (German or French) at the age of 11 instead of 14. This time, however, one canton, deciding it had waited long enough) 20 has broken the deadlock./Zurich, the most populous of the cantons, and the heart of the Swiss banking world, plans to make English a required 行きづまり 銀行薬 UNIT 8 subject at an early age, /maybe even from the first year of primary 小学校 regiment 統制する English is important because it has become the international language. Language policy is a serious political issue in Switzerland. 3 Countries like Switzerland need to teach many foreign languages. It is impossible to deny the increasing significance of English. 5 Switzerland needs English to serve as a "national link language." 27

解決済み 回答数: 1
英語 高校生

1枚目の本文に対する2枚目の問題の答えを3-イか3-ロで迷っているのですが、どちらが正解かわかりません。どなたか理由もあわせて教えてもらいたいです。 よろしくお願いします!

Omoiyari is said to be a key concept of the Japanese mentality. (Its primary meaning is the ability to imagine other people's feelings. Japanese people's good manners have often (2) been associated with it and reported in news articles. For example, Japanese soccer supporters cleaned up the stadium after the matches at the World Cup, actions that were praised by the foreign media. Some experts say the supporters' behavior is related to education in Japan, where children clean their classrooms every day. Another example was seen during the frequent natural disasters. Even in such situations, many people still kept calm and patiently waited in lines for emergency supplies. JANET [ 3-1 ] According to a survey by an organization to promote good manners in Tokyo, less than 30 percent of Tokyo residents think people in Tokyo have good manners. [ 3-□ ] For example, Tokyo residents notice bad manners on the train. (4)Some young people sit in priority seats and do not give sit (5). V₂ 1 up their seats to the elderly, and others put on makeup. [ 3-> ] In an effort to get the passengers to 52 act more (5), railway companies display posters, saying things such as, "Please line up and c wait your turn" or "Please switch your phone to silent mode while ( 6-a) the train." 5 [ 3-= ] Omoiyari is often seen in school mottoes and emphasized in moral education at school. Some of the values that students are ( 6-b) include respecting the elderly, helping those with disabilities, and keeping promises. Students also take turns (6-c) in charge of cleaning the classroom, serving lunch, taking care of plants and animals. In addition, volunteer clubs collect money for charitable organizations and members visit elderly people in nursing homes. In moral education class, students read stories and discuss the topics in them. The teacher facilitates the discussion and the students draw their own conclusions. (Nakaya, et al., Discuss the Changing World, Seibido)

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