整数解を求める方法でこの三つの方法があると思うんですが、どの場合どれを使ったらいいのか見分ける方法はありますか？

460 第8章 整数の性質 例題 253 方程式の整数解 (1) 次の不定方程式の整数解を求めよ. (1) 2x-3y=21 [考え方 解答 Focus (②) 2x-38-212550305210形という関係があるに素であることを利用す。 (2) xとyの係数, 539=52×10+19 という関係がある。 (1) 2x-3y=21 より, 2x=3(y+7) ......① 2と3は互いに素であるから, xは3の倍数とな る. 撥数でかいの できたら、ユークリットやる したがって, kを整数として, x=3k とおける . これを①に代入すると, 2×3k=3(y+7) 2k=y+7 より y=2k-7 よって, 求める整数解は, (2) 52x+539y=19 x=3k, y=2k-7 (kは整数) (別解) 2x-3y=21 より, y=²x-71071081/ete yは整数より, xは3の倍数となる. したがって, x=3k (kは整数) とおけ, y=2k-7 よって, (2) 539-52x10+19 x=3k, y=2k-7 (kは整数) bibe これを与えられた方程式に代入すると, 52x+(52×10+19)y=19 NJIMACARO 倍数となり, んを整数として 整理すると 52(x+10y)=19(1-y) ...... ① 5219は互いに素であるから, x+10yは19の x+10y=19k, すなわち, x=19k-10y これを①に代入すると, 52×19k=19(1-y) 52k=1-yより y=-52k+1 よって, 求める整数解は, x=539k-10,y=-52k+1 (kは整数) 三習 次の不定方程式の整数解を求めよ. 253 (1) 2x-5y-25 * (税込) 2000 (2) 48x+491 ** 不定方程式 ax+by=c (aとbは互いに素) で, aまたはbとcが1より大きい公約数をもつとき, (xの式)=g(yの式) (pとgは互いに素) と変形する xが3の倍数でないとき yは整数にならない. 77 xとyの係数の大きい方 の数 539 を小さい方の数 52で割る. y=-52k+1 より, x=19k-10y =19k-10(-52k+1) =539k-10 181 74-10

英語の文法問題です。 解答を無くしてしまい、解き終わって復習がしたいのにできない状態で困っています。 ご親切な方の解答と解説を参考に復習したいと思うのでよろしくお願いします。

次の下線部から文法的に間違っている箇所を含む番号と箇所を指摘し、正しいものを記述 せよ。 1. The Palestinians claim Israeli-occupied East Jerusalem as the capital of a future state of their own - ruled out by Israel - and political displays by either side are viewing by the other as direct challenges. 2. Shortly after, hundreds of Jewish visitors, including a far-right MP, ascended the hilltop site, where some danced, waves Israeli flags and bowed down to pray, before being stopped by police. 3. This year's march took place amid an already highly charging atmosphere between Israelis and Palestinians. 4. Special Counsel Robert Mueller concluded that Russia tried to damage Hillary Clinton and help Trump win, as did the bipartisan Senate Intelligence Committee panel that it investigated the election. 5. Much of the trial has focused on a Sept. 2016 meeting in which a lawyer working with the Clinton campaign and a technology executive brought to the FBI about contact between Trump and a major Russian bank.

このプリントの表を埋めて頂きたいです

中3 組 番班 氏名 (1) 下のイオン化列中の金属のイオン、水素イオン、 H2O を、電子を受け取りやすい順に並べなさい。 ただし、H2O は水素イオンより電子を受け取りにくく 鉄イオンより受け取りやすい。 イオン化列 : K Ca Na Mg Zn Fe (H2) Cu Ag 金属をイオン化傾向の強い順に並べたもの (2) 下の条件を参考にして表を完成させなさい。 電極は炭素棒を使用した。 陰イオンが電子を離しやすい順: CI > OH > H2O > SO NO H2Oが電子を受け取る反応: 2H2O + 2e → H2 + 2OH H2Oが電子を放出する反応: 2H2O O2 + 4H+ 4 e 電離式 ①塩化ナトリウム Na Cl ② 水酸化ナトリウム ③硫酸 ④硫酸銅 ⑤塩化銅 CuCl2 →Cu²++2Cl ⑥塩化水素 →>>> 電子eを使ったイオン反応式 陰極 陽極 陰極 陽極 陰極 陽極 陰極 陽極 陰極:Cu2+2e-→ Cul 2Cl → Cl₂ + 2C) → CuCl₂ + Cut Cl₂ cl d+e 2Cl → Cl2+20 Ceter 陽極c 陰極 陽極 Cl-. →

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

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Past Tense, Past Progressive (2) Warm Up! (1) ( に入れるのに正しくないものを1つ選んでください。(b) Warm Up He began to practice karate only ( ). 1. recently 2. two weeks earlier 3. these days 4. one week ago Part 2: Grammar Section 《解説と解答》 「彼はつい最近 (2週間早く; 先週) 空手の練習を始めた」 という意味ですから、 3. these days のみが、 過去形の動詞と共に使えない表現です。 these days は 「このごろ (最近)」 という意味で すが、 現在形 現在進行形や現在完了形とともに用います。 Warm Up! (2) ( に入れるのに最適な表現を1つ選んでください。 John didn't want to see me because he () his lunch. 1. once had 2. was having 3. has 4. took 《解説と解答》 「ジョンは昼食中だったので、私に会いたがらなかった」 という意味ですから、 ジョンが私に会い たがらなかった理由を完成させます。 私に会いたがらなかった時に進行していた動作が「昼食を取る」 ことですから 2. was having の過去進行形にするのが適切です。 なお、 have lunch の have は 「食 べる (eat) 」 の意味ですから、この意味の場合haveは進行形で用いることができます。 Exercise 5: Fill in the blanks in these sentences with one of the choices below. 3. A pine tree (a) stands 1. While Cindy. (a) was playing (b) is playing (c) played her violin yesterday, two of her strings broke. (d) has played up late the night before to 2. My paper was due yesterday, so I complete it. (a) stayed (b) stood (b) would stay (c) stay (d) am staying at the gate, and a girl was standing in its shade. (d) standing (c) was standing 4. The car wasn't here yesterday because Jane takes the bus, but the drivers were on strike. (a) uses (b) is using (c) has used 5. One of the boys (a) fall (b) falls 6. When the door bell rang, I (a) take (b) am taking 7. Mr. Brown (a) leave (b) is leaving (d) was using in the river, but I dived in and saved him. (c) were falling (d) fell a shower. (c) was taking the office only a minute ago. (c) was leaving 8. During the last earthquake books (a) fall it. She generally (b) are falling (c) had been falling (d) taking (d) left from the shelf. (d) fell Unit 4 Exercise 6: Fill in the blanks in the passage below with the correct form of the verb in parentheses. The first one is done for you. Mark (live) lives in Japan. His family (come) five years ago, when his father (start) Osaka. At that time Mark was still only 10 years old, and he (do) not want to leave America. But now, he (have) Osaka, and he likes living there. During the last summer vacation, Mark (go) United States with his parents. They (visit) Washington D.C., and Boston, and (enjoy) They also (go) Mark's grandparents. His grandparents (be) see Mark. One evening, as they (eat) the telephone (ring) Mark and his parents (talk) over one hour. Now Mark is back in Osaka. He (want) his grandparents again. He is (plan). America by himself next time. to Japan his own business in many friends in back to the New York, seeing the sights. to a small town in Connecticut to (see) very happy to a big chocolate cake, It was Mark's aunt in California. with her one after another for to (visit) to go to

こちらの問題ご回答してもらいたいです。 回答が見当たらないため...

現在と過 STEP 1 基本問題 ① 現在形 1 ( 内の指示にしたがって書きかえましょう。 (1) I'm not busy on Saturdays. (I を We に変えて) (2) The students run very fast. (The students を The student に変えて) (3) We usually go to school by bus. (We を My brother に変えて) (4) You have some friends in London. (You を Lisa に変えて) 2 次の英文を日本語に訳しましょう。 (1) I respect the leader of our band. (2) She teaches mathematics at high school. 過去形 内の指示にしたがって書きかえましょう。 (1) His mother was at home. (His mother を His parents に変えて) 問合 (2) We play tennis every Sunday. (every Sunday を last Sunday に変えて) LAMA 3) I study English every day. (every day を yesterday に変えて) (4) We have a cute dog. (文末に ten years ago を加えて) 次の英文を日本語に訳しましょう｡ 1) A lot of foreigners came to Japan in those days. E93 I liked this song when I was a high school student.

至急この回答お願いしたいです。

STEP 1 基 ① 現在形 1 ( 内の指示にしたがって書きかえましょう。 (1) I'm not busy on Saturdays. (I を We に変えて) (2) The students run very fast. (The students を The student (3) We usually go to school by bus. (We を My brother に変えて) (4) You have some friends in London. (You を Lisa に変えて) 2 次の英文を日本語に訳しましょう。 (1) I respect the leader of our band. ent に変えて) (2) She teaches mathematics at high school. ② 過去形 1 ( )内の指示にしたがって書きかえましょう。 (1) His mother was at home. (His mother を His parents に変えて) (3) I study English every day. (every day を yesterday に変えて) (2) We play tennis every Sunday. (every Sunday を last Sunday に変えて) IM (4) We have a cute dog. (文末に ten years ago を加えて) 次の英文を日本語に訳しましょう。 (1) A lot of foreigners came to Japan in those days. € 937 -) I liked this song when I was a high school student. ③ 現在進行形 内の指 (1) I am doing (2) He takes (3) She sv (4) My) 2 次の (1) T 201

全部でも一部でもわかる方教えてください！！

1. 次の文に当てはまる正しい語(句) を選び、( )内に書きなさい。 (1) The teacher made me [ read / reading ] the book. その先生は、その本を私に読ませた。 (2) Let me [ knows / know ] whatever you want. 16 (5-7 RETU+RB+HG) ほしい物は、 何でも知らせてください。 (3) [ Let / Let's ] watch the boxing title match on TV. テレビでボクシングのタイトルマッチを見よう。 (4) 1 [ had / got] my brother to help me with my homework. astu Shelp mew 私は、弟に宿題を手伝わせた。 30459551610402 NJ lllwym tanisge loed op em ebem SH ( 3. 次の( 内に正しい語を入れなさい。 (1) The employee ( ago. ob 1eri tel GIR: evad 2.次の 内の3つの語(句) のうち、最も適切なものを○で囲み、文全体を日本語に訳しなさい PROUESO (688JJ-118 適切なもので MTDGHT 1ST DE (1) The gorgeous dress (makes / lets / has ) Jane look like another person. [ Luoy (2) She was always (had/let/ made) to clean the kitchen by her mother. HOM othel. (3) My father ( (4) John (ように! [ EO) Hallona I'nbluos | (3) The teacher (forcing / forced / is forced) the students to go out of the classroor [ (55 (4) Iwas (allows / allow / allowed) to smoke in the room. [ ) JOW LOYD Bario of od ARFJURIA (2) Takeshi could make (0) x) understood in English. W and mand ) compelled to leave the company one mont ,0501:0 ) his computer repaired last year. 内の his hair cut the day before yesterday.

中２の理科です。空いているところを教えてほしいです。お願いします_(._.)_

T ① ….. 2種類以 ************* 上の物質が結びつ いてできる、 別の 1種類の物質。 磁石を 近づける｡ うすい 塩酸を 加える。 3 (4) つく。 が www 発生する｡ (2) 基本の確認 (1) 鉄粉と硫黄の粉末の混合物をアルミ ニウムはくの簡A. Bにつめ, Aはその ままにし、Bを右の図のように加熱して 赤くなったら加熱をやめて, ようすを 観察した。 ① 下線部の後, 反応はどうなるか。 鉄と硫黄の 混合物 B つかない。 ⑤が 発生する｡ A BA 砂血 (2 筒Aの中身の一部を試験管にとり, うすい塩酸を加えると気体が発生し た。 この気体の化学式を書きなさい。 ③ 加熱後の筒Bの中身の一部を試験管にとり, うすい塩酸を加 えると気体が発生した。 この気体のにおいを書きなさい。 ④ 加熱後に筒Bの中にあるものを, 鉄と硫黄の何というか｡ 5 加熱後に筒Bの中にあるものを, 化学式で書きなさい。 6 ⑤には,鉄や硫黄の性質は残っているか。 (2) 加熱した銅板を, 硫黄の蒸気の中に入れると激しく反応した。 反応後にできた物質は何か。 (3) 化学式を使って化学変化を表した下の式について答えなさい。 ① 右のように表した式を何 というか。 ②式図は,水の何という化 学変化を表している かがくしき 式Bの ■にあてはまる化学式を書きなさい。 次の文の □にあてはまる語を書きなさい。 式より水分子⑦個から,イが2個とウが 1950 A 2H2O → 2H2 + O2 B2Ag20→4Ag+ | ④ 水素 4 1③ 硫化水素 ②個できることがわかる。 (4) 化学変化を式で表すとき, 反応の前後で原子の何を同じにすれ ばよいか。 2つ書きなさい。 (1) 1 ②2 水素 ③特有のにおい 4 硫化鉄 ③⑤ Fets FeS ⑥残っていない (②) Cuts CuS 1①1 化学反応式 (3) 2 (3) (4) 4 ア (1) 2点×15=30点 ウ エ

教えてください！！急ぎです💦

実戦テスト 1 次の文の (1) I know a girl ( who (2) The book ( 7 that (3) The street ( which 合格目標 解答 p.12 )に入る適切な語(句) を選び, 記号で答えなさい。 ) is standing at the door. 1 whose ) you are reading is very interesting. 1 whose whatidwani (4) #Mr. Hata loved the animals ( 7 which is 1 who live (5) Kyoto is an international city ( 7 which イ why 70点 次の 日本文の意味を表すように, 時間 40分 where vil odwI what ) leads to the school is narrow. 1 what when ) in the forest. that were ) many people visit every year. there I but 3点×5(15 に適切な1語を書きなさい I where I who lived