大学数学の行列の問題です この問題の（2）が分かりません。 答えはa＝3bなのですが、どうやって解けばいいのでしょうか？ 教えてください！

4. 次の列ベクトルαが列ベクトルb, b2 の1次結合で表すことができるた (1) めの a, b の条件を求めよ. 21 (2) b2=1 888-8-8- b1=2,b2=3 の1次結合で

高校の科目についての質問です。 数学に、数学I αや数学Iβ、数学IISαなどがあるのですが、普通の数学Iや数学IIと何が違うのでしょうか？ ちなみに単位制高校です。

数学Ⅰβ 数学Ⅱ α ② 4 数学ⅡSα... ④ 前 数学Ⅱ β. ② 数学Ⅲ α ③ 前 数学Ⅰ α...... 3 数学ⅡSα・・・・ ③ 後 数学III β ② 後 数学ⅡSB ②前 数学A・ 数学B･･････ 2 数学C..... 2

(5)の問題はなぜエでは駄目なのですか？ 漱石が本を書いたのは80年前という今とは全く関係ないところなのに。だれか教えてください！

ア fell asleep on the sofa. 1 had fallen c has fallen I were falling I were living When a big earthquake hit Kobe in 1995, I ( ( ) there for five years. ア lived 1 had lived 3) I(P) reading until I read this novel. have lived 7 had not liked 1 have not liked didn't like I was not liked When I arrived at the airport, my husband's plane (I), so I couldn't see him. ア left ◄ was leaving has left I had left (5) I bought a novel that Soseki ( エウ about 80 years before. 7 has written 1 was writing had written I wrote 6) My grandparents ( I ) Narita International Airport in two hours. M (8) Preached 1 had reached have reached When I go to the British Museum again, I ( 7 ) there four times. 7 had been the pencil 1 have been will have been We (2) for 25 years at the end of this month. I will reach I will be monnind ased badl

高1 数I 三角比 ｢三角形の辺や角の等式の証明｣ 左辺＝右辺 の形にして証明したいのですが、どうも同じにならず、どこかで間違えているのか、これから展開や因数分解をしたら等しくなるのか、ご指摘お願いします。

c(cosB-cosA)=(a-b) (lt cosc) が成り立つことを証明せよ。 527) rate-b² btc a cl2ac. = 29 2 2bc bica2 25 ab + be²= b²- ab²-ac² +a² 2ab - ab (a - b) -c² (a - b)-b³+a³ 2ab (702) = (a+b) (110) 20 = zabta²+b² = (² -2b Labia+b 29 zab ta³tab-a¢‚² _2ab² _a³b b²+ c²b 296 -ablab)-2ab+b>

3つの短文の英作文を添削して頂きたいです。よろしくお願い致します😭

A この日本文の意味になるように,A,Bは下線部を補い, Cは下線部を英訳せよ。指 示がある場合は,それに従うこと。 いなかった。 (in the next room, really を用いて) 彼らが隣の部屋で話をしているのが聞こえたが、何を話しているのかはちゃんと聞いて I heard them talking in the next room but I didn't really "listen to what they were were talking about. I couldn't recognize him at first B はじめは彼だとわからなかった。というのも、20年以上も会っていなかったからだ。 because; I hadn't seen him for more than twenty years. C ged How indw Talking is an expression of thoughts and ideas in spoken words. Writing is, or should be, those same words on paper. The only person who can truthfully say he has nothing interesting to write about is the person who sits alone in an empty room twenty-four hours a day seeing no one, doing nothing - just sitting and staring. そういう人でさえ, (孤独に暮らすことがどんなことかを語る興味深い手紙を書くことがで きる。 A Even the kind of people asbest Istisu gaimusto sa W people can write an interesting bodegaue which shows what living lonely is like. Del 6d89ihee yab letter

cosBCどちらも1段目の式から2段目の式になっている過程がわからないです。

(4) 余弦定理により >0 cos B = (V6)2+(1+√3)2-22 2.√6(1+√3) 13 る したがっ = 2/3(1+√3)+g 2/6(1+√3) √2 0°<B<180°であるから B=45° また cosC= (1+√3)2 +22-(V6)2 2(1+√3) 2 2(1+√3) 4(1+√3) と 1 A2=6 AT=0 ||

答えを教えてください。 特に問2と問5を教えてください。

B freed stance band did wastobe 92019 sait asgbui ad) no bet You've heard about a change in school policy at the school in the UK where you are now studying as an exchange student. You are reading the discussions about the policy in an online forum. dand eva New School Policy <Posted on 21 September 2020> To P. E. Berger alleWaM From: K. Roberts and et sansumo Leubivibas but more Dear Dr Berger, not been teen as On behalf of all students, welcome to St Mark's School. We heard that you are the first Head Teacher with a business background, so we hope your experience will help our school. I would like to express one concern about the change you are proposing to the after-school activity schedule. I realise that saving energy is important and from now it will be getting darker earlier. Is this why you have made the schedule an hour and a half shorter? Students at St Mark's School take both their studies and their after-school activities very seriously. A number of students have told me that they want to stay at school until 6.00 pm as they have always done. Therefore, I would like to ask you to think again about this sudden change in policy. Snoisulave Regards, Ken Roberts Head Student H Jaslia TEST DIBIRUOM S ThH Jaslie 18970 1997 IfiH jolie 1894 nistavoM 1894 misjauOM A 1891 oistonoM 1970 19 9 IiH trofiz 1891 gintaoM HiH jolie d

下に全文訳を載せているのですが、特に最後の文章の意味とどう訳したかが分かりません。直訳と解説をお願いしたいです。 どういうわけか、私は日曜日には熱心に庭いじりをする。死ぬまでこうやっ ていこうと思う。私は地上の青々と育つ草木すべてにいささか「感動」を覚える。 こんなふうに... Read More

8 演習 8 (問題→本冊: p.159) noo goblesb For some reason or other, I am an eager Sunday gardener. I will die one. I am a bit "touched" by every green-growing thing on earth. This strangeness has not put me in any hospital.

なぜ3ではダメなのでしょうか？😭

問8 8 Mrs. Yamamoto friends. ①cleaned up (3 has been cleaning up the kitchen when her husband came home with his 羽田 2) had just cleaned up 4 would have cleaned up

左が問題で、真ん中、右が解答です。 真ん中の解答の、黄色の線の引いたところをなぜ示さないといけないのかわかりません。よろしくお願いします😭

四面体 OABCのOA, OC の中点を,それぞれL,Mとし,辺OBを2:1に外分す る点をNとする。 直線AB と LN, 直線 BC と MN の交点を,それぞれR, Sとする。 | また, OA = a, OB,OC = とする。 (1) OR を a, を用いて表せ。 また, OS を,cを用いて表せ。 (2) RS//LM であることを示せ。