(2)の解説 方程式の文字の値をすり替えるって、、、方程式のルール的に完全アウトじゃないですか？ これなんでOKなんですか？

56 基本例題 30 絶対値と不等式 次の不等式を証明せよ。 (1) |a+b|≦|a|+|6| (2) |a|-|6|≦|a+bl 指針 (1) 前ページの例題29と同様に(差の式)≧0 は示しにくい｡ |A=A2 を利用すると, 絶対値の処理が容易になる。 そこで A≧0, B≧0のとき の方針で進める。また,絶対値の性質(次ページの①~⑦) を利用して証明しても よい｡ (2)(31)と似た形である。 そこで, (1) の結果を利用することを考えるとよい。 CHART 似た問題 1 結果を利用 [2] 方法をまねる la+b≧(lal+|6|)² (3) la+b+cl≦la|+|6|+|el ●基本 29 重要 31 A≧B⇔A'≧B'⇔A'-B'≧0 (1) (lal+ b)²-la+b|²=a²+2|a||b|+6²-(a²+2ab+6²) |◄|A³=A² 解答 =2(labl-ab)≧0 |ab|=|a||6| ...... よって 00000 よって la+b≧0, lal +6 ≧0 から la+6|≦|a|+|6| この確認を忘れずに。 別解] 一般に,|a|≦a≦|a|-|6|≦b≦|6| が成り立つ。 | A≧A, |A|≧-A この不等式の辺々を加えて から-|A|A|A| -(|a|+|6|)≦a+b≦la|+|6| したがって la+b|≦|a|+|6| (2) (1) の不等式でαの代わりにα+6, 6 の代わりに - b とおくと |(a+b)+(−b)| ≤|a+b|+|−b| よって |a|≦la+6|+|6| ゆえに |a|-|6|≦la+6| [別解 [1] [a|-|6|<0のとき a+b≧0であるから,|a|-|6|<la+6|は成り立つ。 [2] |a|-|6|≧0のとき |a+b-(|a|-|6|)²=a²+2ab+b²-(α²-2|a||6|+62) =2(ab+lab)≧0 よって (|a|-|6|)≦|a+b² |a|-|6|≧0,|a+b≧0であるから |a|-|6|≦la+b1 [1], [2] から |a|-|6|≦|a+b| (3) (1) の不等式での代わりにb+c とおくと la+b+c)[≦la|+|b+cl la+b+cl≦|a|+|6|+|c| ≦|a|+|6|+|c| -B≤A≤B ⇔|A|SB ズーム UP 参照。 <|a|-|6|<0≦la+bl [2] の場合は, (2) の左 辺, 右辺は0以上であ るから, 右辺20 を示す方

分詞の問題です ６番の答えがなんで①になるのかわからないです💧 車が壊されたのは見つかるよりも前なので完了分詞構文を使った③だと思ったのですが💧💧

3 surround 6. Bob found his car ( ). 1 damaged 3 damage I cow him ( ostana 4 surrounding village, we decided ( stansiy youll daith y del mon 2 having damaged 008, amoe to er 4 damaging trgor won ayeb sasa ni olqoqlabis stom Ihr many photographers

丸しているものが答えなんですけどなんでその答えになるのか分かるところだけでいいので教えて欲しいです🙇🏻‍♀️

(6) 彼らは明日の今頃はそのレストランで昼食を食べているでしょう。 They will ( ) lunch at the restaurant about this time tomorrow. ア. have イ be having ウ, having (7) 兄は私にフランス語を学ぶようアドバイスしました。 ウ. would (8) 彼は私がそのパスケットボールチームに入ることを強く要求しました。 He insisted that I ( ) join the basketball team. ア. could I should ウ. would My brother advised me that I ( ) learn French. ア. could イ should (9) その計画は成功する可能性が高い。 (10) その子どもを助けるなんて、君は勇敢だった。 The plan has a good chance of ( ). ア. result イ effort ウ. experience エ success (1) 彼女は攻撃を耐え抜いた。 You were ( ) to save the child. ア. honest イ brave ウ. gentle エ. sensitive (15) (12) 私の母は夕食の準備をするのに忙しい。 My mother is busy ( ) dinner. 7. reaching 1. searching preparing I. rolling She ( ) the attack. ア. surprised イ, surveyed ウ. surrounded エ survived (13) 彼女の最新小説の題名は『動物園』です。 The ( ) of her latest novel is "Zoo." ア. topic イ. label ウ title エ. information (14) 都市に住むことと、 いなかに住むことと比較してみなさい。 ( ) living in the city with living in the country. ア. Conduct ⓘ Compare ウ. Attack I. Decorate (19) 古紙はすべて再生利用している。 We ( ) all our waste paper. ア. prefer, hate ウ. divide エ recycle (16) 多くの人々がその戦争で死んだ。 Many people were ( ) in that war. ア. hurt イ killed ウ. attacked エ. wounded (7) これらの古い本を保存しておこう。 Let's () these old books. ア, deserve イ. observe ウ. reserve エ preserve (18) これは根本的な重要性に関わる問題だ。 This is a question of ( ) importance. ア. typical イ. individual ウ fundamental I. certain 彼は封筒の裏に自分の名前を書かなかった。 He didn't write his name on the back of the ( ). ア. title イ. copy ウ envelope I. paper

丸しているものが答えなんですけどなんでその答えになるのか分かるところだけでいいので教えて欲しいです🙇🏻‍♀️

(6) 彼らは明日の今頃はそのレストランで昼食を食べているでしょう。 They will ( ) lunch at the restaurant about this time tomorrow. ア. have イ be having ウ, having (7) 兄は私にフランス語を学ぶようアドバイスしました。 ウ. would (8) 彼は私がそのパスケットボールチームに入ることを強く要求しました。 He insisted that I ( ) join the basketball team. ア. could I should ウ. would My brother advised me that I ( ) learn French. ア. could イ should (9) その計画は成功する可能性が高い。 (10) その子どもを助けるなんて、君は勇敢だった。 The plan has a good chance of ( ). ア. result イ effort ウ. experience エ success (1) 彼女は攻撃を耐え抜いた。 You were ( ) to save the child. ア. honest イ brave ウ. gentle エ. sensitive (15) (12) 私の母は夕食の準備をするのに忙しい。 My mother is busy ( ) dinner. 7. reaching 1. searching preparing I. rolling She ( ) the attack. ア. surprised イ, surveyed ウ. surrounded エ survived (13) 彼女の最新小説の題名は『動物園』です。 The ( ) of her latest novel is "Zoo." ア. topic イ. label ウ title エ. information (14) 都市に住むことと、 いなかに住むことと比較してみなさい。 ( ) living in the city with living in the country. ア. Conduct ⓘ Compare ウ. Attack I. Decorate (19) 古紙はすべて再生利用している。 We ( ) all our waste paper. ア. prefer, hate ウ. divide エ recycle (16) 多くの人々がその戦争で死んだ。 Many people were ( ) in that war. ア. hurt イ killed ウ. attacked エ. wounded (7) これらの古い本を保存しておこう。 Let's () these old books. ア, deserve イ. observe ウ. reserve エ preserve (18) これは根本的な重要性に関わる問題だ。 This is a question of ( ) importance. ア. typical イ. individual ウ fundamental I. certain 彼は封筒の裏に自分の名前を書かなかった。 He didn't write his name on the back of the ( ). ア. title イ. copy ウ envelope I. paper

どうして(a-c)だけ符号が変わるのですか？？

Sc}(b-c) (a−b)(ac)=(a−b)(b-c)(c-a))( + 21

考えても分かりません。解答お願いします

20 Unit 1 - History - Gutenberg is famous for inventing printing, but he didn't really invent it. He invented a better way of printing. [2] For hundreds of years people used blocks of wood* to print. They used a knife to cut words backward in the block of wood. Then they covered the block with ink and pressed it onto paper. When they pulled the paper from the inky blocks, the words appeared on the 金属 5 paper in the right direction. In Korea and China, people printed with metal type* instead of 右向き wood. (2)Either way, printing was difficult and very slow. It took several years to make one copy of a book. [3] Books were very expensive and rare. Only ( 3a ) people could buy them, and ( 3b ) 10 people could not read. But, as ( 3c -) people learned to read, books became more popular. So people wanted to find a quicker, better and less expensive way to print books. One of these people was Johannes Gutenberg. opsugas.l Y tinU 9003 iinil 4 Gutenberg was born in Mainz, Germany, around 1400. He was good at working with metal, but probably had no idea how people printed in China. His idea was to make a piece Clarey operan 15 of metal type for each letter of the alphabet and use the letters (4)over and over. (5)He could put the type together to make words and arrange words to make pages. With ink on the type, he could press paper on them to print a page. A "printing press" machine could make hundreds of copies of a single page quickly. After that page, he could rearrange the same letters to make other words and print other pages. LISSH Si nou 5 It took Gutenberg a long time to make the type for each letter of the alphabet. When he finished the type, he didn't have enough money to make the printing press. He borrowed money from a man named Johann Fust. After many years, Gutenberg's printing press was Legione ready. Gutenberg printed his first book, the Bible, around 1455. 6 There are only twenty-one complete copies of the original Bible. They are some of the 25 most expensive books in the world. In 1987, part of a Gutenberg Bible sold for $5.3 million. 7 Today people remember Johannes Gutenberg. The city of Mainz has a statue of him and a museum. His original printing press is in the museum. (6)They print several pages a day to show that it is in good condition. earoviaU 012mu 394 words/#IN block of wood: type: vrigsypola 01 sind 7 an Oupside down & 下線部 (6) を日本 7. 本文の内容に合わ Many people & Gutenberg g Gutenberg Olt was a long Though Gu cost a lot of Hannes Rotest

左の写真の本文を読んで、右の写真の問題の答えを教えてほしいです🙇🏻‍♀️💦

Father: Meg: What are you reading, Meg? 7 You've been reading that since 10a.m. It's a book about haiku. It's a little difficult, but it's interesting. Look. Haiku have been an important part of Japanese culture since the Edo period. Japanese people have been writing haiku for centuries. ポエムズ Haiku are different from traditional English poems. 7 (7) リトウン First, they are not written in sentences. They use only a few words. ライム Second, the lines do not have to rhyme. スイーズナル インクルーディド Third, a seasonal word must be included. On the other hand, like most English poems, ドウム rhythm is very important. Haiku use three lines スイラボーズ five, seven, and five syllables long. 父: メグ, 何を読んでいるの? 朝の10時からずっとそれを読んでいるようだけど。 メグ : 俳句についての本だよ。 ちょっと難しいけど、 おもしろいの。 ほら見て。 俳句は日本文化の重要な一部となっている 江戸時代から 日本人は何世紀にもわたって俳句を書き続けている。 俳句は伝統的な英語の詩とは異なっている 第1に, 俳句は文で書かれない。 ごくわずかの語を使う。 第2に, 行は韻を踏む必要がない。 第3に, 季語が含まれていなければならない。 一方で、 ほとんどの英語の詩と同様, リズムは非常に重要である。 俳句は3行を用いる｡ 5･7･5の音節からなる Edo periad

3枚目の問いの答えを教えてください。 よろしくお願い致します。

Radio Host: durlar aind Roger Ali: Radio Host: Roger Ali: Radio Host: Roger Ali: Radio Host: Roger Ali: Roger Ali: Radio Host: Roger Ali: Radio Host: Welcome back. As I mentioned before the break, Roger Ali is with us today to talk about artificial intelligence. Thank you for being here, Dr. Ali. Thank you for having me. I'll be honest with you. When I hear the words "artificial intelligence," the first thing I think of is the character HAL from the movie 2001: A Space Odyssey. ch tud goons bad Radio Host:ome In other words, the search engine draws conclusions about what we're looking for on the Internet. Roger Ali: Sure. Many people remember HAL. In the movie, he's the computer that controls the systems of a spacecraft. He also speaks with the people on the spacecraft. And he's not very happy when the people decide to turn off the computer. In the movie, HAL becomes very dangerous. That's right, but fortunately, artificial intelligence in the real world isn't like HAL. Well, that's good! Can you tell us what is happening in the field of AI? Many interesting things. For example, when we search for something on the Internet, the search results that we see are chosen carefully. The search engine has learned which websites are the most popular, the most reliable, and so on. This prevents us from seeing a lot of websites we're not really interested in. Tosa Right, so it only shows us the information it thinks we want to see, which includes go advertisements as well. We usually see only ads for products that the computer thinks we might want to buy. You said, "It thinks," but is the search engine really thinking? IST That depends on your definition of thinking. The search engine is capable of learning machine learning-and it does have knowledge. Knowledge about the Internet. Are learning and knowledge part of your definition of thinking? They're part of it, but human beings are capable of so much more. We have our senses hearing, smell, sight, touch, taste-and our emotions. We notice a lot about the world, and we use our judgment to make decisions. That's true, and most computer scientists know that we can't replace human beings with computers. We don't intend to make robots for every kind of job, either. That's just not practical.

2の5 なぜ間接話法に直すのにtoldではなくsaidなんですか？

She said that she would clean her room that night. Ho Jisse Bwdue gala DO DE 199 2 ☆ She said, "I (orn no) clean my room (bu Rabas t bro 次の各文を間接話法を用いて書きかえなさい。chB Alaba The teacher said to them, "Hand in your reports tomorrow." The mother said to her son, "Don't eat too much."0 ton been ei LEX. He asked me, "Can you speak Japanese?" und eiland son edes 5. My mother asked us, "What do you want to eat today?" moT 15 Harry said to his girlfriend, "Let's go to see a movie." OT 190 Mary thought, "How cute these puppies are!" (²4) 2011 m²T 10 JOY er Cand leave for school at se ja jogiz stal sd [l'uoy to qu 474

因数分解ですおしえてください😭

練習 5 次の式を因数分解せよ。 (1) x-2x³+1 lab Tyb □ (2) 64x-y