なぜBHがsa+(t-1)bになるのかがわかりません。（AHも同様） 一つ前の問題（例題24）では1-tを利用し問題を解いていたんですがなぜ今回の問題ではt-1を利用して解くんですか？

0 基本例題 25 垂心の位置ベクトル 平面上に△OAB があり, OA = 5,OB=6, AB=7 とする。 また, △OABの垂 心をHとする。なる2点A,Bをとる。 (1) cos ∠AOB を求めよ。 2 (2) OA=4,OB=とするとき, OH を a, ♂ を用いて表せ。 指針▷ 三角形の垂心とは,三角形の各頂点から対辺またはその延長に下ろした垂線の交点であり, △OABの垂心 Hに対して, OA⊥BH, OBIAH, ABIOH が成り立つ。 そこで, OA⊥BH といった図形の条件をベクトルの条件に 直して解く。 (2) では OH = sa+tとし, OA・BH = 0, OB･AH=0の2つの条件から,s,tの値を求める。 とし、 OX 解答 (1) 余弦定理から DEFELETEO COS ∠AOB= VAN Hは垂心であるから OA⊥BH, OB⊥AH OH = sa+t(s,t は実数)とする。 +8= OA⊥BH より OA･BH=0 である 119 à•{sa+(t-1)}=0 (2)(1) から ･ = |a||5|cos∠AOB=5・6･ =6集 5 △OAB は直角三角形でないから,垂心Hは2点A,Bと 一致することはない。 から よって ゆえに すなわち 25s+6t=6 また, OB ⊥AHよりOB･AH = 0 であるから ZXAB よって ゆえに ① ② から したがって sla+(t-1) a1=00-0000 25s+6(t-1)=0 S= 52+62-72 2･5･6 5 24' ...... 【 t= ・{(s-1)a+t6}=0 (s-1)ã•b+t|b²=0 6(s-1)+36t=0 すなわち s +6t=1 ・ 19 144 19 5 OH=2+1447 a+ 言 12 60 5 A 1-1/1/20 p.400 基本事項 ⑤ 重要 28 0 A 5A8+8¹Ã8.5=UA B H AB-01 TA [参考] AB=16-ak =161²-26-a+la1² |AB|=7, |a|=5,||=6で あるから 72=62-2 ・a +5² よって d.1=6 垂直→ (内積) = 0 BH-OH-OB ・B |a| =5, a-6=6 421 つく ①垂直 (内積) = 0 MAH=OH-OA 2a-6=6, 161=63 ① ② から 24s=5 SIC+SASTAA LA 1章 位置ベクトル、ベクトルと図形

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2 下線部に最も近い意味を表す語(句)を1つ選びなさい。(各1点 計7点) ☐021 I had no more than two thousand yen when I arrived at the station. 3 only 1 much 2 often very 022 I suspected he might turn down our invitation, as he seems to be busy these days. 1 dislike 3 hide 2 refuse (名城大) 4 accept 023 As is often the case with him, he arrived at his office punctually. 2 in advance 3 on demand 1 in haste 4 on time 024 This kind of view is, in fact, quite a familiar one in this technology. 2 commonly 3 particularly 4 reportedly actually (流通経済大 ) 025 Unfortunately, my sister passed away recently, but I keep her in my heart. 3. Ⓒ developed cancer 2 had an operation 4 died 3 had a leg cut off 1026 Tracy wanted to show off her new dress at the party. 1 sell 2 remove 3 display 4 hide (東海大) (日本大) (藤田保健衛生大) (高知大) 027 I have deep admiration toward those who are in charge of such difficult patients. 1 accuse 2 look for 3 make contribution to 4 take care of (新潟医療福祉大)

至急答えを教えて頂きたいです🙇‍♂️🙇‍♂️🙇‍♂️

26 LESSON 7 1 Choose the best answer to fill in the blanks. (1) (1) Peter ( ) for ten years next month. she 1 teaches 3 will teach 900 (3) Our teacher is ( 1 likely the (4) My father is ( 6 more tall (2) In my class, there are three students from abroad. One is from England and ( are from Australia. another here ℗ to my climbing 3 me to climbing (8) ( Din (5) My parents objected ( & triguod ad 2 others 1 Judging from 3 Though (6) She had to shout to make herself 2 hear I have heard 2 will be teaching 4 will have taught 3 the other ) to come by the time we promised to get together. 2 possible 3 probable 4 definite ) of the two men standing at the gate. M 2 taller 3 the tall /30 (7) The project could be called a success, all things ( 1 consider 2 considered 3 considering (10) We are now in the ( (1) late about ) the mountain alone in winter. ) the sky, it will rain this afternoon. ). 3 heard (11) All teachers and students are not ( 1 necessarily 2 necessary 4 the others ) half of our training camp. 2 latter 3 later 4 the taller IACISTU \ion) sem 2 me of climbing 4 on me to climb JJ: 7-ASRE 4 hearing 2 Generally speaking 4 It being 4 to consider (9) You must leave now; ( ), you will be late for your social studies class. 1 instead 2 therefore 3 otherwise 4 accordingly 4 last ) wise and hardworking. 3 need 4 needed St (12) ( ) had the war begun when terrorists hijacked a plane. 1 The moment 2 No wonder 3 Hardly 4 As soon as (京都産) (関西学院 (13) Next week's seminar ought to provide ( ) with a lot of new information. 3 ourselves 4 us 1 ours (2 our THIO (千葉工 (近畿 AS-ARSTORSHAN (実践女 (摂 (大阪学 (センター (國學 (55) (二松学 (tale

分詞についてです。 写真のような問題で、空欄に適するものを選ぶコツなどはありますか？ 2つの文を分子構文を使ってつなげる方法は理解しているつもりなのですが、空欄補充となると、分からなくなります。教えてください🙇‍♀️

Lesson 6 (Participle) 2 1 空所に入れるのに最も適当な語句を、次のa)~d)から1つずつ選びなさい。 和の文本日 J.(!!) 改する ) daily, vitamin pills can improve your health. *** ( 桃山学院大 ) Takend) Take aussilts\\no) grivst a) Taking (b) To take KE 2. The dog, properly ( (a) having trained b) to train Please look over your English essay ay for any a) being turned in b) having turned in c) turned it in d)) turning it in 4. (i) that you have been living in Japan for 20 years now, you should speak the ―ということを考慮すれば language well. At Considering~: ~ Vica) Considerons b) Considerate c) Considered 15. ( 使い ), will be a faithful servant. ) stormy, all the flights a) Being (b) It being c) Been (京都橘女子大) S trainedd) training any errors before (¹) esmiteryoe zoniran (立命館大) AU (南山大 ) Considering ubanist s Hokkaido were canceled. \ Ils of \SY 2 d) It been (神奈川大)

コミュ英の英文和訳の問題です。 A happy old age is what many people spend their lives preparing for, aiming for financial security and good health in th... 続きを読む

化学基礎の物質量の問題です。この問題を解いたのですが答えが分からないので確認として答えを教えて欲しいです！

まとめ 物質量の計算 物質量と粒子の数・質量・気体の体積の関係をまとめた。 それぞれの関係を理解 して,問題を解いてみよう。 問 ÷ (6.0×102/mol) 粒子の数 問a 問 b アボガドロ 定数 x (6.0×1023/mol) 質量(g) モル質量 [g/mol] 数値は原子量・ 分子量 式量に等しい xモル質量 物質量 〔mol] (1) ~ (4) の物質量を答えよ。 (1) 水素原子 6.0×1023個 (2) 銅原子 3.0×1024個 (3) 水分子 1.5×1022個 (4) アルミニウムイオン 6.0×1024個 (1)~(4) の物質量を答えよ。 (1) ダイヤモンド 0.12g (3) 二酸化炭素 2.2g (1)~ (4) の粒子の数を答えよ。 (1) 炭素 1.0mol 中の炭素原子 (2) ナトリウム 0.50mol 中のナトリウム原子 (3) 二酸化炭素 1.5mol 中の二酸化炭素分子 (4) 塩化カルシウム2.0mol 中のカルシウムイオン 必要があれば,原子量は次の値を使うこと。 アボガドロ定数は 6.0 × 1023 /mol とする。 また,気体はすべて標準状態とする。 H = 1.0, He = 4.0, C = 12, N = 14,0=16, Na = 23, Mg = 24, A1 = 27, S = 32, Ca = 40,Fe = 56 気体の体積 [L] ÷ (22.4L/mol) モル体積 (標準状態) 0℃, 1.013×105 Pa LIP0.2 (2) マグネシウム 4.8g (4)炭酸ナトリウム 5.3g JUX (22.4L/mol) 16 16 mol mol g mol 5 10 15 20 5

答え欲しいです（ ; ; ） お願いします‼️

54 tro Exercises 1 5. 6. Lesson 71 不定詞 ① Dialogue A: What do you want to be in the future? 将来何になりたいですか。 B: I want to be a florist. 私は花屋になりたいです。 A : I hope your dream will come true. あなたの夢がかなうことを願います。 1 日本語に合うように,[ [ ]内の動詞を使って英文を完成させなさい。 AC 1. スポーツを観戦するのはわくわくする。 It is exciting 2. それはお気の毒に。 I'm that. [ hear ] 3. 彼女の目標は慈善事業のための資金を集めることだ。 Her aim 4. 私たちは彼が元気だと知ってうれしかった。 We were pleased 5. 私のひいおじいさんは90歳まで生きた。 My great-grandfather lived 6. リサは試験勉強をするために, 夜更かしした。 Lisa stayed up late [watch] _money for charity. [ raise ] that he was fine. [know] 90. [be] 2 [ ]内から適切な動詞を選び, 不定詞に変化させて下線部に入れなさい。 [総合] 1. She grew up. a doctor. 2. My father needs 3. Hot drinks help. 4. There is nothing. I'm very happy [ be / drink / keep/stay/study/stop] for the test. [ prepare] smoking. LAJ (25è our body warm. in the fridge. with you. is necessary for every student. 教p.64 p.e 3 左右の語句を適切につなぎ, 英文を完成させなさい。 BC 1. We have some work • to catch the last train. 2. I woke up ・to finish today. 3. I need a piece of paper ･ to say such a thing. 4. She hurried to the station・ ・to write down his phone number on. 5. He must be crazy ・ to find that I had gone past my stop. Exercises 2 4 絵に合うように, 1. ooo 5 ピクニックに 1. We dec 2. They ha 3. He wa- 日本語に合 1. 私は (do 2. 穴を Ca U 3. U Ca そ 6 日本 1. T T 2. C offi (po pha

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29. You should not keep pets ( 1 if 2 unless 30. We will be able to accept your offer ( unchanged. decided 32. ( 1 ☐33. ( 2 proposed 4 suggested 3 provided 31. "Couldn't you make the price on this car one million and a half?" "Well, all right, ( ) that you pay in advance." in case 2 in circumstance 4 on the condition 3 for good □ 34. ( 1) you take good care of them. 3 otherwise 4 though 35. ( ) the passenger sitting next to you wasn't feeling well, what would Remember Suppose 4 Act 3 Think ) that you assure us that the agreed price will stay 111 ), he is so talented, he cannot finish all the work he has now. Despite 2 Because 3 Since 4Although ) she is short, she runs faster than any other student in my class. 22 Therefore 1 Even 4 If 3 Though 36. Igo jogging every morning, ( Coo even if 3 in spite of you ) it's raining. except for although 111 <中部大 > ) I started watching the tennis final, I could not do anything else until it ended. 111 Although 2 During 3 For 4 Once 〈近畿大 > < 学習院大 > do? 〈大阪産業大 〉 111 < 摂南大〉 112 < 神奈川大 > 37. Many Japanese have a Christian style wedding, ( ) they are not Christians. 1 as if 2 despite 3 even though unless 112 <杏林大 > 112 〈 岩手医科大 > 時 112 < 金城学院大 > 112

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29. You should not keep pets ( 1 if 2 unless 30. We will be able to accept your offer ( unchanged. decided □ 32. □ 33. ( 2 proposed 3 provided suggested 31. "Couldn't you make the price on this car one million and a half?" "Well, all right, ( ) that you pay in advance." in case 3 for good □ 34. ( ) you take good care of them. 3 otherwise 35. ( ) that you assure us that the agreed price will stay 111 < 学習院大 > 1 Even 2 in circumstance 4 on the condition 4 though ) the passenger sitting next to you wasn't feeling well, what would you do? Suppose 2 Remember 3 Think Act ), he is so talented, he cannot finish all the work he has now. Despite 2 Because 3 Since Although 36. Lgo jogging every morning, ( O even if 3 in spite of ) she is short, she runs faster than any other student in my class. Therefore 3 Though 4 If ) I started watching the tennis final, I could not do anything else until it ended. m <近畿大 > 4 Once 3 For 2 During Although ) it's raining. except for 111 <中部大 > 4 although 37. Many Japanese have a Christian style wedding, ( 1 as if 2 despite 3 even though 4 unless 〈大阪産業大 > 111 111 <摂南大〉 ) they are not Christians. 112 < 神奈川大 > 112 <杏林大〉 112 〈 岩手医科大 〉 112 < 金城学院大 > 112

この教材を使っていて解答を持ってる方で もしよろしければ20ページから22ページの 助動詞（1）と（2）の模範解答を送っていただきたいです。 私の学校は模範解答が配られなかったのですが もし持ってる方がいらっしゃればよろしくお願いします🙇

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