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数学 高校生

(3)の答えの答えになるまでの途中式をお願いします。

基礎問 260 第8章 ベクトル 167 球と直線 座標空間内に,球面 C:x'+y^+z'=1 と直線があり、直線 1 は点A(a, 1, 1) を通り, z=(1,1,1)に平行とする.また、 α≧1 とする. このとき, 次の問いに答えよ. (4) (1) Z上の任意の点をXとするとき,点Xの座標を媒介変数tを 用いて表せ. (2) 原点Oから1に下ろした垂線とlの交点をHとする.Hの座 標をαで表し, OH をαで表せ. (3) 球面Cと直線lが異なる2点P, Qで交わるようなaのとり うる値の範囲を求めよ. (4) (3) のとき,∠POQ=90° となるαの値を求めよ. 精講 点A(xo,yo, zo) を通り, ベクトル=(p,q,r)に平行な直 線上の任意の点をXとすると, tu OX = (xo,yo, zo)+t(p,q,r) と表せます。 (2) Hは上にあるので, (1) を利用すると, OH がαと tで表せます. そのあと, OH・Z = 0 を利用して,t をαで表します。 (3) 球面Cと直線lが異なる2点で交わるとき, OH < 半径 が成りたちます。 POQ=90°をOP・OQ=0 と考えてしまっては, タイヘンです. それは,PとQの座標がわからないので, OP, OQを成分で表せないから です。座標やベクトルの問題では, 幾何の性質を上手に使えると負担が軽く なります。 解答 (1) OX=OA+tu=(a, 1, 1)+(t, t, t) =(t+a, t+1, t+1) .. X(t+a, t+1, t+1)

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英語 高校生

問1の答えが2になる理由を教えてください!1にしてしまいました。 問4のnoがはいる理由も知りたいです

5 10 § I 準否定・部分否定と全否定 Level 3 英文読解問題 次の英文を読んで、以下の問いに答えなさい。 National, religious, geographical, linguistic and cultural groups do ( 1 ) タイ 198 fulx correspond to racial groups, and the cultural features of such groups have no clear connection with racial features. (1) Americans are not a race, nor are Frenchmen nor Germans. Moslems and Jews are no more races than are Roman Catholics and Protestants, nor are people who live in Iceland or Britain or India, or who speak English or any other language, or who are culturally Turkish or Chinese. In speaking of such groups, the use of the term “race” may not be a serious error, but it is (2)one which is often made. Hall Human races have been classified in different ways by different scholars. up of of the However, most of them agree in classifying the existing mankind into at least three large units, which may be called major groups. (3) Such classification does not depend on any single physical characteristic. For example, skin color by itself does ( 1 ) distinguish one major group from another. 13 SREIC 問1 空所( 1 )に入る適切な語句を下から選びなさい。 ① not necessary ② not necessarily 問2 下線部 (1) を訳しなさい。 GALBOS & OFF 19van ton £1CIE 3 not any 4 no ITR00 問3 下線部 (2) は何を指すか英語で答えなさい。 Ils Ja tail is ton si SH asil traven ei H 問4 下線部 (3) を以下のように言い換える場合、空所には何が入るか。 適切な1語を 答えなさい。 Such classification depends on ( ) single physical characteristic. vode si st reel edt of tail is jon er at

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理科 中学生

(1)、(2)を教えてください🙇‍♀️🙏

2 次の問いに答えなさい。 (1) 植物のはたらきを調べるため、息をふきこんで緑色に調 よう 整したBTB溶液を入れた試験管A,B,C,Dを用意し た。 試験管Aと試験管Cにはオオカナダモを入れ、 試験管 Bと試験管Dには何も入れずにゴム栓をした。 試験管Cと 試験管Dをアルミニウムはくで包み、図1のように並べ て、光の当たるところに一定時間置いて, BTB溶液の色の 変化を調べた。 0 37.6 5.7 1 液の色が黄色に変化したのはどの試験管か。 A~Dから1つ選び,記号で答えなさい。 めいしょう (2 ①の試験管で,液中にふえたのは、 何という気体か。 名称を書きなさい。 実験から、一定時間光を当てていたときのオオカナダモの光合成や呼吸について正しく述べた ものを、次のア~エからすべて選び, 記号で答えなさい。 ア 試験管Aのオオカナダモは、呼吸よりも光合成をさかんに行っていた。 イ 試験管Aのオオカナダモは、光合成よりも呼吸をさかんに行っていた。 ウ 試験管Cのオオカナダモは,光合成だけを行っていた。 I 試験管Cのオオカナダモは,呼吸だけを行っていた。 13.3 しょうさん (2) 60℃の水100gが入ったビーカーを3つ用意し, 塩化ナトリウム, ミョウバン、硝酸カリウムを 20 図 1 すいようえき ようかいど それぞれ35gずつとかした水溶液をつくった。 表はそれぞれの物質の溶解度を表している。 温度 [℃] 塩化ナトリウム 〔g〕 ミョウバン〔g〕 硝酸カリウム 〔g〕 37.8 11.4 A B 31.6 3種類の水溶液の温度を20℃まで下げると, もっとも 1 多くの結晶が出てくる物質は何ですか。 また, 出てきた結 けっしょう 晶の質量は何gですか。 ①のように, 溶解度の差を利用して再び結晶としてとり 出すことを何といいますか。 ③図2のような装置を用いて, 水溶液と結晶を分ける方法 を何といいますか。 ④ ②の方法で水溶液から結晶をとり出せない場合、 別の方 法で結晶をとり出すことができる。 その方法を、 「水」とい かんけつ う語句を用いて簡潔に書きなさい。 オオカナダモ 40 OFF 38.3 23.8 63.9 図2 60 39.0 57.4 ゴム栓 109.2 アルミニウム ガラス棒 ろ紙 ろうと

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英語 中学生

⑦に入る2語を答える問題です! 答えがfour hoursなのですが、なぜそうなるのですか?私はeight hoursだと思いました!!

10 15 20 5 6 次の英文は Olango という森の中にあるいくつかの村に住む動物たちの対話です。 これを読んで、あとの問いに えなさい。 Ay 40 was ' Kabbu is head of the Post Office of Olango, a forest. Many kinds of animals live there. Kabbu and his tea carry letters all over Olango and to other forests. Kabbu's Post Office is very popular among all animals there. Ullu: Why are you so sad? Kabbu: *Probably we'll have to lose my job. Have you heard of the Internet? Ullu: Have humans planned to catch us with a new kind of net? Kabbu: No, no. I hear the Internet is new *technology. All the computers can talk to each other through the Internet. We can talk with everyone around the world by a computer. Leo has the newes computer. He is always using it. He has also made many friends through the Internet and talk with them for hours. Ullu started to think about the Internet after he listened to Kabbu's long report about it. Ullu: Tell me, Kabbu, why will you have to lose your job because of the Internet? Kabbu: Leo is now sending e-mails all over Olango and to other forests. He says everyone in this village will be able to use his computer and send e-mails from his computer. Now, if everyone starts sending e-mails, ① 私たちはどうすればよいのかわかりません。 45 Ullu: Wait, wait. Now what is 'e-mail'? I haven't heard of it. Kabbu: It means *electronic mail'. It is used to send every kind of letter from one computer to other computers through the Internet. It takes only *a second and it is almost free. Ullu: I can't believe it. Kabbu: It is true. So I am very sad and worried about it now. With a sad face, Kabbu flew away. Kabbu was the oldest animal in Olango and was respected a lot by Leo Ullu decided to go and meet Leo and talk with him. At Leo's house, Leo was sitting in front of his computer. Ullu: Leo, can you give me a few minutes? I have to talk about something important. Leo: What is it? Ullu: It is about Kabbu, but I think it may be about all of us. Leo: OK, tell me about it. Ullu: But Leo, I think 50 55 1 60 Ullu told Leo about Kabbu. Leo: Well, Kabbu's *concerns will be real. We usually think high speed and *efficiency are very important, so there is little *chance for old ways. I can send a message in a second through the Internet. But Kabbu and his team need a few days to carry one. Why should I *depend on them? And the *price of their mail is much higher than the price of e-mail. Ullu: But, Leo, what will happen to Kabbu and his team? Leo: They will have to 3 The Internet will become more important in the future and e-mail will be one of the most useful things. 4 trains in the future." But now, "No one will go to see a movie." But both... Leo: You may have a lot of things to say about it, Ullu, but soon e-mail will make Kabbu's mail *useless. Kabbu and his team should start looking for other jobs *after all! For example, when a plane was invented, people said, "No one will see trains still continue to run. When a TV was invented, everyone said.

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英語 中学生

長い文章ですが、1〜6まで教えてください🙇‍♀️ お願いします🙇‍♀️

4 次の英文は、中学生の涼太 (Ryota) がある出会いを通して学んだことについて 英語 の授業でスピーチをしたときのものです。 1~6の問いに答えなさい。 I Hi. I'm going to talk about my experience this summer. visited my brother, Takuya, in Tokyo. He has lived there and studied at a college for two years. I took the eleven o'clock An hour later, a foreign Shinkansen for Tokyo on July 26. woman with a big bag came to the seat next to me. She smiled s at me, but I didn't talk to her. She looked at the baggage rack for a while and then sat in her seat. She put her big bag on her lap because she could not put it on the baggage rack. I thought I should help her, but I didn't do anything for her. She was on the Shinkansen for about one hour and got off. About one hour later, I arrived at Tokyo Station. That night, my brother and I talked about the woman on the Shinkansen. I But I said, "I didn't do anything for her because I can't speak English well. know I should help her." He asked me, "Ryota, if a Japanese woman with a I big bag comes to the seat next to you, will you help her?" I said, "Well ..., don't know." He said, “I don't think that you didn't help the woman on the 15 Shinkansen because you can't speak English. We need some courage when we want to be kind to someone. When I was a junior high school student, I also didn't have courage. You need to have courage, Ryota." I said to him, "I see. I'll have courage to be kind to people around me." I thought, "What should I say in English when I want to help someone?" 10 courage : 20 On the return Shinkansen, the foreign woman came to the seat next to me again! She had the big bag again. I thought I should have courage and said, "Excuse me. ()" She said, "Oh, thank you very much." Then I put her bag on the baggage rack and asked her, "Do you remember me? I was next to you on the Shinkansen two days ago." She smiled at me and said, "Wow ! 25 Yes. I remember you. Hello again." I felt very happy and said to her, "I'm Ryota. You could not put your bag on the baggage rack two days ago. I knew that, but I didn't do anything. I'm sorry." She said, "Oh, it's OK. You are kind. I'm Anila, from India. This is my first trip to Japan." Then we talked a lot together. I talked about my family and school life. I 30 was (2) because I could talk in English. That was my first experience for me. When she got off the Shinkansen, she smiled at me and said, "I hope we can meet again." I learned an important thing from my brother. Thank you very much. () experience: # college: take ... for ~ : ~行きの・・・ に乗る foreign: 外国の seat: baggage rack: 500 next to ~: ~のとなりの [に] smile at ~: ~にほほえむ for a while : しばらくの間 lap : ひざ anything: (否定文で) 何も return: 帰りの Anila: アニラ (女性の名前)

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英語 中学生

長いですが、1〜6まで教えてください🙇‍♀️🙏

4 次の英文は、中学生の涼太 (Ryota) がある出会いを通して学んだことについて 英語 の授業でスピーチをしたときのものです。 1~6の問いに答えなさい。 I Hi. I'm going to talk about my experience this summer. visited my brother, Takuya, in Tokyo. He has lived there and studied at a college for two years. I took the eleven o'clock An hour later, a foreign Shinkansen for Tokyo on July 26. woman with a big bag came to the seat next to me. She smiled s at me, but I didn't talk to her. She looked at the baggage rack for a while and then sat in her seat. She put her big bag on her lap because she could not put it on the baggage rack. I thought I should help her, but I didn't do anything for her. She was on the Shinkansen for about one hour and got off. About one hour later, I arrived at Tokyo Station. That night, my brother and I talked about the woman on the Shinkansen. I But I said, "I didn't do anything for her because I can't speak English well. know I should help her." He asked me, "Ryota, if a Japanese woman with a I big bag comes to the seat next to you, will you help her?" I said, "Well ..., don't know." He said, “I don't think that you didn't help the woman on the 15 Shinkansen because you can't speak English. We need some courage when we want to be kind to someone. When I was a junior high school student, I also didn't have courage. You need to have courage, Ryota." I said to him, "I see. I'll have courage to be kind to people around me." I thought, "What should I say in English when I want to help someone?" 10 courage : 20 On the return Shinkansen, the foreign woman came to the seat next to me again! She had the big bag again. I thought I should have courage and said, "Excuse me. ()" She said, "Oh, thank you very much." Then I put her bag on the baggage rack and asked her, "Do you remember me? I was next to you on the Shinkansen two days ago." She smiled at me and said, "Wow ! 25 Yes. I remember you. Hello again." I felt very happy and said to her, "I'm Ryota. You could not put your bag on the baggage rack two days ago. I knew that, but I didn't do anything. I'm sorry." She said, "Oh, it's OK. You are kind. I'm Anila, from India. This is my first trip to Japan." Then we talked a lot together. I talked about my family and school life. I 30 was (2) because I could talk in English. That was my first experience for me. When she got off the Shinkansen, she smiled at me and said, "I hope we can meet again." I learned an important thing from my brother. Thank you very much. () experience: # college: take ... for ~ : ~行きの・・・ に乗る foreign: 外国の seat: baggage rack: 500 next to ~: ~のとなりの [に] smile at ~: ~にほほえむ for a while : しばらくの間 lap : ひざ anything: (否定文で) 何も return: 帰りの Anila: アニラ (女性の名前)

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英語 中学生

長いですが、1〜6の問題を教えて欲しいです🙏

4 次の英文は、中学生の涼太 (Ryota) がある出会いを通して学んだことについて 英語 の授業でスピーチをしたときのものです。 1~6の問いに答えなさい。 I Hi. I'm going to talk about my experience this summer. visited my brother, Takuya, in Tokyo. He has lived there and studied at a college for two years. I took the eleven o'clock An hour later, a foreign Shinkansen for Tokyo on July 26. woman with a big bag came to the seat next to me. She smiled s at me, but I didn't talk to her. She looked at the baggage rack for a while and then sat in her seat. She put her big bag on her lap because she could not put it on the baggage rack. I thought I should help her, but I didn't do anything for her. She was on the Shinkansen for about one hour and got off. About one hour later, I arrived at Tokyo Station. That night, my brother and I talked about the woman on the Shinkansen. I But I said, "I didn't do anything for her because I can't speak English well. know I should help her." He asked me, "Ryota, if a Japanese woman with a I big bag comes to the seat next to you, will you help her?" I said, "Well ..., don't know." He said, “I don't think that you didn't help the woman on the 15 Shinkansen because you can't speak English. We need some courage when we want to be kind to someone. When I was a junior high school student, I also didn't have courage. You need to have courage, Ryota." I said to him, "I see. I'll have courage to be kind to people around me." I thought, "What should I say in English when I want to help someone?" 10 courage : 20 On the return Shinkansen, the foreign woman came to the seat next to me again! She had the big bag again. I thought I should have courage and said, "Excuse me. ()" She said, "Oh, thank you very much." Then I put her bag on the baggage rack and asked her, "Do you remember me? I was next to you on the Shinkansen two days ago." She smiled at me and said, "Wow ! 25 Yes. I remember you. Hello again." I felt very happy and said to her, "I'm Ryota. You could not put your bag on the baggage rack two days ago. I knew that, but I didn't do anything. I'm sorry." She said, "Oh, it's OK. You are kind. I'm Anila, from India. This is my first trip to Japan." Then we talked a lot together. I talked about my family and school life. I 30 was (2) because I could talk in English. That was my first experience for me. When she got off the Shinkansen, she smiled at me and said, "I hope we can meet again." I learned an important thing from my brother. Thank you very much. () experience: # college: take ... for ~ : ~行きの・・・ に乗る foreign: 外国の seat: baggage rack: 500 next to ~: ~のとなりの [に] smile at ~: ~にほほえむ for a while : しばらくの間 lap : ひざ anything: (否定文で) 何も return: 帰りの Anila: アニラ (女性の名前)

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英語 中学生

とても長い文章ですが、読んで頂き、1〜6まで教えて欲しいです🙏

4 次の英文は, 中学生の涼太 (Ryota) が、 ある出会いを通して学んだことについて,英語 の授業でスピーチをしたときのものです。 1~6の問いに答えなさい。 I Hi. I'm going to talk about my experience this summer. visited my brother, Takuya, in Tokyo. He has lived there and studied at a college for two years. I took the eleven o'clock An hour later, a foreign Shinkansen for Tokyo on July 26. woman with a big bag came to the seat next to me. She smiled 5 at me, but I didn't talk to her. She looked at the baggage rack for a while and then sat in her seat. She put her big bag on her lap because she could not put it on the baggage rack. I thought I should help her, but I didn't do anything for her. She was on the Shinkansen for about one hour and got off. About one hour later, I arrived at Tokyo Station. I don't know. That night, my brother and I talked about the woman on the Shinkansen. I But I said, "I didn't do anything for her because I can't speak English well. know I should help her." He asked me, "Ryota, if a Japanese woman with a big bag comes to the seat next to you, will you help her?" I said, "Well He said, "I don't think that you didn't help the woman on the 15 Shinkansen because you can't speak English. We need some courage when we want to be kind to someone. When I was a junior high school student, I also didn't have courage. You need to have courage, Ryota." I said to him, "I see. I'll have courage to be kind to people around me." I thought, "What should I say in English when I want to help someone?" ...9 10 courage : 1007 20 On the return Shinkansen, the foreign woman came to the seat next to me again! She had the big bag again. I thought I should have courage and said, "Excuse me. ()" She said, "Oh, thank you very much." Then I put her bag on the baggage rack and asked her, "Do you remember me? I was next to you on the Shinkansen two days ago." She smiled at me and said, "Wow ! 25 Yes. I remember you. Hello again." I felt very happy and said to her, "I'm Ryota. You could not put your bag on the baggage rack two days ago. I knew that, but I didn't do anything. I'm sorry." She said, "Oh, it's OK. You are kind. I'm Anila, from India. This is my first trip to Japan." Then we talked a lot together. I talked about my family and school life. I 30 was (2) because I could talk in English. That was my first experience for me. When she got off the Shinkansen, she smiled at me and said, "I hope we can meet again." I learned an important thing from my brother. Thank you very much. () experience: # foreign : 外国の seat: baggage rack: college # take ... for ~: ~ 行きの・・・ に乗る next to ~~のとなりの[に] smile at ~: ~にほほえむ for a while: しばらくの間 lap : ひざ anything: (否定文で)何も return: 帰りの Anila : アニラ (女性の名前)

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