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英語 中学生

赤丸で囲っているところの解答解説教えてください🙇‍♀️ 回答解説が配られておらず、困ってます💦

2 次の対話文が成立するように,( )に入る適切な英語1語をそれぞれ書きなさい。ただし, 内に示された文字で書き始め、その文字も含めて答えること。また,1つのに1文字が 入るものとする。 (1) A: May I help you? 良さそうに見える。 2.ex. B: Yes, I'm looking for a shirt. This shirt looks good, but it's too large for me. Do you have a (s ) one? (注) May I help you? いらっしゃいませ。 7 Somedas 2 summer vacation, Yuji? B: I went to Kyoto and visited some temples. It was a lot of fun. A: That's good. A: Just a moment, please. (2) A: What did you do (dr ngs h 14 just a moment 少々お待ちください 3 次の対話文の意味が通るように,( 内のア~オを正しい語順に並べかえ,その順序を記号 で答えなさい。 ただし, 文頭にくる語も小文字で示してある。 aloy of hom - 2 I have (1) A: What are you going to do next Sunday? B: I'm going to study. (アa lot of イ have ウ to I homework オI) do on that day. A: I see. オ (2) A: A lot of people speak English today. B: That's right. It (アin イ countries ウ studied エ many オ is) now. ア A to こんにち (注) today 今日では A : My friend, Saya, can speak Japanese and English. It's July 14. It's Paul's birthday! (3) A: B : Ⅰ (ア this イ give ウwill エ racket オ him). What do you think? A: That's a good idea! オ アエ オ

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英語 中学生

解答解説がなく、困っています。 赤丸(大問②⑤⑥、大問④の小問2)のところについて、回答、解説教えていただきたいです🙇‍♀️

4 次の英文は、英語の授業の課題として, 中学3年生の研翔(Kento)が書いた英文です。これを読 んで、あとの問いに答えなさい。 I'm going to write about my experience. Ahn the ル ついて書皿 My father started living in London five years ago. When I 母は5年間ロンドンに住んでいた。 was eleven, my mother and I went there to live with my father. さいの A 1242 = 12 115 We lived in London for three years. Yan x Last month, my family came back to Japan. 先月 121. We were living with my father in London, so I was ti ) at 私たちは父と住んでいた。 だから、暴れる悲しかった first. But I worried about school because I couldn't speak English well. There were a lot of students from other countries at school in London. Some of them spoke English very well, and others didn't. But they always looked happy when they were talking Little by little I learned English through talking with the other 10 students. I started to feel that speaking English was not a big problem. together. B One day, an American student came to talk to me. He said, "Hi. My name is Kent Jones. Your name is the same as mine, right?" "Yes," I said, “Our names are almost the same. We use kanji.” I wrote my name in kanji. I said, "This is my name. means studying, and 'to' means flying." Kent said, "Wow, that's a cool name." and I became good friends and often visited each other's families. 'Ken' Kent 15 C I Kent's father often took me to nice spots in and around London. found that Kent ew a lot about the history of London. He taught me a lot about the culture there. I really enjoyed talking with his family. However, there was a problem. Kent's family liked Japan and wanted to know more 20 about it. When they asked me about Japanese culture such as food or history, D I was sad. I realized I didn't know many things about my country. realized I had to learn more about Japanese culture. After I came back to Japan, I continued to talk with Kent on the internet. My English is getting better, but I should learn more about my own country. I'm going to study hard 25 about Japanese history and talk to Kent about it. I hope we will meet in Japan someday. (2) () London F month A at first 最初は American アメリカ人の the same as ~ ~と同じ each other おたがい take ~を連れていく spot taught teach however しかしながら own 自分自身の someday いつか internet インターネット I also little by little 少しずつ through ~を通して almost ほとんど fly knew know(~だとわかっている)の過去形 ask ~にたずねる realize 〜だと実感する

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数学 高校生

どうやってb=-2aのグラフがb=a^3-2aのグラフに接しているとわかるんですか?

例題225 3本の接線が引けるための条件(2) 本 点P(α, b) から曲線 y=x-2x に異なる3本の接線が引けるとき,点 ARSEBORGS P(a,b) の存在範囲を図示せよ. |解答 y=x-2x より, y'=3x2-2 したがって, 曲線上の点 (t, ピー2t) における接線の方程 式は, U 考え方 曲線上の点(t, ピー2t) における接線の方程式に (a,b) を代入した3次方程式が,異 なる3つの実数解をもつための条件をa, bに関する不等式で表す。 d y-(t³-2t)=(3t²-2)(x-t) つまり, y=(3t2-2)x-2t3 この直線が点(a,b) を通るので, b=(3t²-2)a-2t3 より 2t3-3at2+2a+b=0 ..... ① t の方程式 ①が異なる3つの実数解をもつような (a,b) の条件を求める. f(t)=2t-3at2+2a+b とおくと, at 14 f'(t)=6t2-6at=6t(t-a) f' (t)=0 とすると, t=0, a したがって, ① が異なる3つの実数解をもつのは, y=f(t) のグラフが t軸と異なる3点で交わるときより, a≠0 かつf(0)・f(a)<0 SAMLE f(0)・f(a)=(2a+b)(-ω°+2a+b)<0より, [2a+b>0 1-a³+2a+b<0 [b>-2a つまり, よって、求める領域は, 右の図の斜線部分で,境 界線は含まない . ANDA HA いよい b<a³-2a または {20+2a+b>0 または どうやって このグライカツ [b<-2a でるのか. b>a³-2a -√√2 ba b=a³-2al が接する 2 どうやっ れからの 502 a **** b=-2a 13 a>0のとき f(0)>0 AV. a 0 ! f(a)<0 a<0 のとき f(a)>0 A xC x f(0)<0 f(a) f(0) が異符 号 a=0のとき, f(0) f(a) ={f(0)}^≧0 より α = 0 は f(0) f(a)<0に含ま れている. 原点で接する. A co O≤6 解答

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