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Mathematics Senior High

(2),(3)がよく分からないです。 特に(2)では、(β/α)^2=−1がなぜそうなるのかよく分からないです。 (3)では、絶対値β/α=1がわからないです。 よろしくお願いします。

ポイント整理 4 例題2 Oを原点とする複素数平面上に A(α),B(B)がある。 次の各場合に △OAB はどのような 3角形になるかを調べよ. (1) a 2-la-B|² = | B|² (2) a2+B2=0 3) 2β=(1+√3i)a 3角形の形状を決定する問題与えられた式から,辺や角についての情報を読み取ろう。 着眼 (1)|a|,|B|,|a-Bがそれぞれ辺 OA, OB, ABの長さを表すことに着目する。 (2),(3)与えられた式のままでは,辺や角の情報が読み取れないので、式を変形することを考 OB B や∠AOBがわかることに着目し, 与えられた えよう. の絶対値や偏角を調べることで, OA α ASTANARE (8) 式から 解答 これより a これより OB2+BA'= OA² となるので, △OAB は∠OBA= (2)△OAB ができるときα≠0となるので B = ti (8)² = -1 a これより の値を求めてみよう. (1) 与式を変形して |B12+ |a-B12=|α|2 |2|=1, arg a a OB OA .. 1, arg = +42 したがって, △OAB は∠AOB= =1,∠AOB=匹 2 (3) α≠0より, 与式を変形して B_1+√3i OB OA = COS |2|=1, arg=5 3 HUMORES TT の直角2等辺3角形である. 2 の直角3角形である. =1,∠AOB π 3 - π tising S CATE したがって, △OAB は正 3角形である. STU HO XEZPQ Lonja (答) ESTRAER L3@n=m (√3) 153 M 01① ← B = ±ia より,βはαを原点 0 を中 心にまたは2だけ回 転した点であることがわか る. BOXCORES MOSSO LOHA: $3@N=m B = (cos+₁ T COS 3 3 より, B. はαを原点Oを +isin la 2 お魚さ十公内中心に今だけ回転した点 であることがわかる. (答)ように、

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English Senior High

教えてください💦

1 Choose the best answer to fill in the blanks. (1) (1) Three years ( 3 ) since I came here. 1 pass 2 were passed (2) ( Many ) all of the houses have been sold. 2 Mostly (3) I have nothing to do ( 1 to 2 for (4) The new amusement park is ( 1 fifth time as large 3 five times as large (5) She was born ( Dat... by ... on (6) If I ( 1 win (7) There isn't ( 1 a few (8) She tries to do ( 1 what ) Kyoto ( 2 in... on in (11) The window ( 1 leave 3 have passed ) the affair. (10) The new station building ( will have been 2 has (12) I wanted to see ( D1if 3 Almost 3 about ) as the old one. 2 while ) a million dollars in the lottery, I would travel around the world. (2) won 3 winning 4 will win 2 fifth time larger five times larger ) July 7, 1977 ( 3 in ... on ... at ) her mother did in the past. 2 how 3 when ) information on this topic in the library. (3) an 2 many (13) ( -) that this is a serious matter. You are important realizing 3 You are important to realize ) open by the child. 2 leaves 4 passed (9) An event ( ) French culture was held at our university last week. having been introduced 2 introduced 4 which introduce 3 introducing The most 4 with 3 left ) all the members had arrived. 3 who 4 which ) 7:17 in the evening. 4 on at ... at 4 much 4 which ) completed by the time you return from your year abr 3 has been 4 to be (亜紀 (4) was left 5 what (東京 2 It is important for you realizing It is important for you to realig (京都 (大阪 (京都 ( (九州産

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English Senior High

英コミュ1です。 この解答合っているでしょうか? 答えがないので、教えて頂きたいです🙇‍♀️

【6】 英文を読み、以下の問いに答えなさい。 In Hawaii, there were a large number of Japanese-Americans who worked on farms. Many of them were ( ① ) the terrible situation in their homeland from Uchinanchu, or people from Okinawa. They heard a soldier who came back from Okinawa. Then, they decided to buy and send 550 pigs ②there. (省略) ③ About sixty years after the war, the members of the music band BEGIN, from Okinawa, were impressed by this episode in history. (以下略) 問44 ( ① )に当てはまる語として適切な語を答えなさい。 of 問45 下線部②の示す場所を日本語で答えなさい。 沖縄 問46 下線部 ③ の about と同じ用法を含む選択肢を1つ選び, 記号で答えなさい。 ア. We talked about the music in Hawaii. イ. There were about ten pigs on the farm. ウ When I was about to leave, it began to rain. 【7】 英文を読み、以下の問いに答えなさい。 Aは道に迷い,目的地までの道順を尋ねようと近くを歩いていた Bに声をかけました。 A: ( (1) ). I'm looking for the crepe shop. B: The crepe shop ? Go down this street. Turn right at the second corner and you'll see it on your left. A: Thank you. B: (② 問47 ( ① に当てはまる適切な語(句)を選択肢から選び,記号で答えなさい。 ウ. Please 問49 ア. I'm sorry ① Excuse me 問48 Aの目的地はどこですか? 文中から抜き出しなさい。 crepe shop )に当てはまる適切な語(句)を選択肢から選び,記号で答えなさい。 ウ You're welcome イ. You are kind (2) 7. See you later IS 問50 会話を終えた後のAさんの行動として最も適切なものを選択肢から選び,記号で答えなさい。 ア道をまっすぐ進み, 2番目の角で右へ曲がる イ. 坂道を下り、 2つ目の信号を右に曲がる ウ. 道をまっすぐ進み, 2番目の角で左へ曲がる

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English Senior High

UNITE STAGE2のLesson11です。 2️⃣と5️⃣と7️⃣を教えてください💦

Reading 00000000000000 Read the passage and answer the questions. The number of foreign tourists to Japan is increasing every 60 year. In 2016, over 20 million people visited Japan for sightseeing. Many of the visitors come from Asian countries near Japan. These tourists enjoy Japan's unique food, traditional buildings, 5 and natural scenery. But the Japanese government wants even more tourists to come. They started a plan to encourage tourists to visit the country more than once. First, the government asked tourists what they want to do during their first visit. Eating Japanese food is the most popular 10 activity. The least popular is skiing. Next, they asked them what they want to do on a second visit. The research shows that few tourists want to do the same activities again, such as eating Japanese food. However, skiing and snowboarding, and nature tours are more attractive for second time visitors than first- 15 timers. The biggest increase is in seasonal experiences, such as seeing cherry blossoms in the spring or falling leaves in the autumn. Clearly, foreign tourists want to experience something new and unique for their second visit. Things foreign tourists want to do in Japan 100 80 60 40 20 0 96.4. 58 ア -75.3- 46.8 87.4 47.6 visiting famous shopping places 3.1 18.2 This time in Japan DAS S Next trip to Japan 7.4 .16.2. nature tour / visiting farms and fishing ports 60-62 12.2 32.1¯ These results are very useful for 61 tour companies. They now 20 make 3 unique tours for foreigners. Some companies even provide tours to schools, farms, and fishing ports. On these tours, visitors from all over the world can enjoy many activities. They can enjoy communicating with Japanese people too. They will surely visit Japan many times. (229 words) 44 QHints scenery (si:nari seasonal [sizan cherry blossom bli 桜の花 fishing port

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