数Cのベクトルの問題です。右写真の青線部の式の意味がよくわからないので教えてほしいです。

222 第8章 ベク 基礎問 141 3点が一直線上にある条件 40 AOAB の辺 OA, OB上に点 C, D を, OC: CA=1:2, OD:DB=2:1 となるようにとり, ADとBCの交点をEとす るとき,次の問いに答えよ. A (1) AE:ED=s: (1-s) とおいて, OE を s, OA, OB で表せ (2) BE: EC=t: (1-t) とおいて, OE を t, OA, OB で表せ (3) OE を OA, OB で表せ. 精講 すると ベクトルの問題では, 「点=2直線の交点」 ととらえます. だから間 題文に「交点」 という単語があれば,そこに着目して数式に表せばよ いのですが,このとき, 「3点が一直線上にある条件」 が使われます。 <3点 A, B, C が一直線上にある条件> I. Aが始点のとき AC=kAB II. A以外の点□が始点のとき -40- たく同じ形 50/+10m □C=mA+nB (ただし,m+n=1) (1)のs (1-s), 21-t) のところは 「AD と BC の交点をE」 という文章を A, E, D は一直線上にある B, E, Cは一直線上にある と読みかえて,II を利用していることになります. また,この手法では同じベクトルを2通りに表し、次の考え方を使います。 06=0 のとき (このときは1次独立であるといいます) pa+qb=pa+q'b=p=p', q=a' A KBC TAGS SA 解答 (1) OE = (1-s) OA+sOD内 = (1-s)OA+s(OB) ■3点A,D,Eが一 直線上にある条件

答えあっているでしょうか、、🥲🥲

BAをBと共有する 59. Human beings ( ) many physical features with apes. ) many physical features with apes. share A with B AEBER 193 1 offer 2 resemble n3 share 年 4 discuss 〈日本赤十字豊田看護大〉 60. She congratulated herself ( ) such a good idea. congratulated A on B 1 having thought of 3 on having thought of 2 of having thought of 4 to have thought of AにBのことで お祝いを述べる < 創価大〉 ) his new surroundings. adapt A to B AEBUITE ぜった 61. He found it hard to adapt himself ( 1 to 2 in 環境 3 for (4) at すべて私には 1 good 62. His excuse for being late did not make ( 言い訳 2 sense 〈佐久大〉 ) at all to me. make sense 14 7" 7 2. a decision (4) ends meet 〈 青山学院大 〉 63. I'd like to ( ) advantage of the opportunity (to visit the Louvre Museum Museum (while I'm in Paris. 1 use 64. ( 2 have 3 make ) attention to what he says. He is very reliable. pay attention to A Ali 74) 1 Make 2 Do 〈名城大〉 take advantage of A ④ake Aを利用する 〈岩手医科大〉 信頼できる 3 Pay aid vd 4 Feel すべ 4 try keep A in mind Aを心に留めておく 10 <東京電機大〉 3 plan ④regard ) that it's Golden Week. take into account Aを考慮に入れる 〈南山大 > 65. Accidents can happen at any time. When you are driving, you must (b) this in mind. 事故 1 keep 2 put ③ take 66. If you're thinking of driving to Kyoto, you'll need to take into ( I thought ②account 動詞を含む

この問題についてで、ここでは質量数=原子量としてるのですが、参考書には非常に近い値になってる(3枚目の写真の一番下の行です)と書いているだけで、同じとは書いてないのですが、よいのですか？教えて欲しいです！

:3:4 (j) 79:79:81:81 (2) 白金は,原子番号 78 で,おもに四種類の同位体が存在する。 同位体の存在比の多い 〔18 龍谷大 改〕 順番に並べると, 存在比 34% の同位体の中性子の数は 117個, 存在比 33% では 116 個である。 存在比が三番目の同位体の中性子の数は 118 個,四番目では 120個とする と,四番目の同位体の存在比は何%か。 整数値で答えよ。ただし, これら四種類以外 の同位体の存在比は1%以下であるため, 計算上無視してよいものとし,白金の原子 量は195.08 とする。 [14 愛媛大 改] Ko

なぜこの問題は対偶を使わないのですか

149 ① αが正の無理数ならば,√は無理数であることを証明せよ。→対偶なし 対偶「Tagが有理数ならばのは正の有理数」を証明する. Jaは有理数であるとする。 有理数ことをすると、Ja=r 2 a=r rが有理数ならばドも有理数なんでこの等式は矛盾する。よって、aは無理数 そのため、のが正の無理数ならば、√は無理数

黄色マーカーで引かれた部分の文構造が分からないため教えて頂きたいです。よろしくお願いいたします。

その親密なから奇跡的 S V ③ The two persons become well acquainted, their intimacy loses more and more of its miraculous character, 消 until their antagonism, their disappointments, their mutual boredom kill whatever is left of the initial excitement. macquainted (adj) = knowing or being familiar with a person「 sval dianshin with someone

英文を読んで答える問題です。かっこの中教えてください。書いてるところは合っているか確認お願いします🙇

(d)/ You have probably heard of endangered animals such as orangutans and elephants. However, not only animals but also many languages are at risk of extinction. 2 Today 6,000 to 7,000 languages exist in the world. UNESCO estimates that half of them are spoken by fewer than 6,000 people-and those languages might disappear within 100 years. That means two or three languages become extinct every month. 3 Why is this happening? Young people prefer using a majority language, which enables them to communicate with more people and enjoy more career opportunities. As a result, English has come to be widely used across the world, and parents are not always willing to teach their mother tongue to their children. Thus, minority languages are now dying with the older generation. 4 Languages are a part of the world's cultural heritage. Once we lose a language, we can never retrieve it. We can never appreciate the wisdom that was conveyed in the lost language. 10

英検2級の問題です。添削して欲しいです🙇‍♂️

ライティング(英文要約) 記入してください。 ●以下の英文を読んで,その内容を英語で要約し、解答欄に記入しなさい。 ●語数の目安は45語~55 語です。 SO 解答用紙のB面にある英文要約解答欄に書きなさい。なお、解答欄の 外に書かれたものは採点されません。 解答が英文の要約になっていないと判断された場合は, 0点と採点されること があります。英文をよく読んでから答えてください。 University students often plan for their future careers by attending job fairs or searching online for information about different kinds of work opportunities. There are other ways, too. Some of them choose to join short-term work programs at companies called internships. 002 29112 diw These have some good points. Students will be able to know more about companies they are interested in, such as what kind of jobs there are and what kind of people are working there. Also, internships allow students to get to know other students. These students can encourage each other both during and after the internship. She has a On the other hand, if students choose to join very short internships, they may not be able to understand the job they are doing before the internships end. Also, students who take part in internships may find it difficult to do well in their studies.

47で、for人をto人にしたらだめですか？

their business together. 47 We had been waiting for Matt for an hour when he came. 48 Aya came thirty minutes late. She had taken the wrong econd Stage bus.

17行目のtheirは神ということですか？教えて頂きたいです。よろしくお願いいたします。

10 The energies of conquest were not merely more efficient technologies. The European settlers used technological advantages for personal benefit. They viewed - the land as a source of commodities as raw material waiting for transformation 心理学 Although the psychology of the settlers varied considerably, according to class, religion, and nation of origin, most of them shared a set of beliefs that led to *4* 15 expansionism. They believed in the Biblical *injunction to be fruitful and multiply, 集めよ揃えよ and they believed that they were to use their talents to the maximum to develop the 摂理 land, which *divine providence had placed in their hands. They saw the Native *REV Americans as *heathens who had failed to utilize the New World, which to Europeans orld, wh seemed a wilderness. The technological differences between Native and European C 実証する。 o cultures appeared to demonstrate the superiority of the newcomers. Machines xoa 新しくもののが優れていること increasingly would become the measure of man, and the very energies of conquest (3) seemed to justify the victory. RS 1月

英語わかる人教えて欲しいです 受動態のやつです ほんとに苦手すぎて分かりません、😭

3 [ ] の語を適切な形にして, 英文を完成させなさい。 1) Her words were [shock ] and offensive. 2) We were [shock ] at the news of the big earthquake. 3) She was [excite ] when the singer appeared on the stage. 4) The concert was so [excite ] that I couldn't sleep afterward. 5) The results of the exams were [ satisfy ]. 6) Ms. Smith was [satisfy ] with his report. 7) They weren't [ frighten ] by the snake. 8) The monster in the movie was [ frighten ]. 9) The view from our room is [ disappoint ]. 10) He was [disappoint ] at his test results.