（2）の考え方を教えていただきたいです。 内積0を使うのかな？という検討はつきましたが、条件で与えられているベクトルをどのように扱えばいいか分からなくなってしまいました。

第1問 R3を3次元実列ベクトル全体の集合, I 3×3 を3×3 の実行列全体の集合とする. 1, 12, 73 ∈ R3は一次独立な単位長ベクトル, 4∈R3は n1, 2, ng と平行でない単位長ベクトルとす る.また,正方行列 A, B を 4 A= - 2 B = Σnin T \\n-n i=1 とする.ここで, XT, æT はそれぞれ行列 Xの転置行列とベクトルæの転置ベクトルを表 す。 以下の問いに答えよ。 (1)Aの階数が3となるような 4 に関する条件を求めよ. (2) 3次元ユークリッド空間において以下の3つの条件を満たす4つの平面 II = {æ ∈ R3 | new - d = 0} (d は実数, i = 1, 2, 3, 4) を考える (i) A の階数は3であ る, (ii) Ω = {æ ∈R3 | new-d≥0, i = 1, 2, 3, 4} が空集合ではない, (iii) II (i = 1, 2, 3, 4)に接する球C (⊂ Ω) が存在する. このときCの中心の位置ベクト ルをベクトルuER を用いて A-1u の形で表す. d (i = 1, 2, 3, 4)を用いてuを 表せ. (3) B が正定値対称行列であることを示せ. (4)4つの平面 {æ∈R3|nex-d=0} (dは実数, i = 1, 2, 3, 4) への距離の2乗和が 最小となる点P を考える. Pの位置ベクトルをベクトルver を用いて B-1 の形 で表す. ni, di (i = 1, 2, 3, 4) を用いて”を表せ. (5)13において点 Qi (位置ベクトルをER3とする)を通りに平行な直線をんとす る(i = 1, 2, 3). 任意の点R (位置ベクトルをy∈ とする) をんに直交射影した 点を R; とする.R の位置ベクトルを行列 Wi∈ R 3×3 を用いて y - Wi(y-æž) と表 す. I∈IR 3×3 を単位行列とする. (a) と I を用いて W を表せ. (b) WWWż を示せ. = (c)平面Σ = {ER3 | afx = b} を考える (a∈3は非零ベクトル, b は実数). 点SE∑はL, Iz, 13 への距離の2乗和を最小にする点である.n1, n2, n3 が互 いに直交するとき,Sの位置ベクトルをベクトルw∈3 を用いて aa ab I - w+ T ara の形で表す.ただし, は a,bには依存しないものとする. w を Wi, πi (i = 1, 2, 3) を用いて表せ. p. 1

電子式合ってますか？

心のもの CON Nのもの これ20 さんそ M電子52なのに 自分のものは2つしか とい

英検2級です！ アドバイスください🙇‍♀️

I think Japanese people in general will be able to improve their English ability in the future. First, school education tended to focus on grammar and reading, but new policy will encourage teachers to help students English ability. In the future. English learning tools are increase. So, they can study chanse very more. Also, English is used their life. This is why I think their English ability improve in the future.

英検2級のWritingです。 採点(添削)お願いします🙇‍♂️🙏

以下のTOPICについて, あなたの意見とその理由を2つ書きなさい。 ●POINTSは理由を書く際の参考となる観点を示したものです。 ただし, これら以外の観点から理由 を書いてもかまいません。 bib vil 語数の目安は80語~100語です。 bool yari aliriw slime just by li OT $ TOPIC of 8 The vol OTA dless of Today, some kindergartens have started teaching English to their children. Do you think it is a good idea to teach English to children in kindergartens? POINTS Career ●Japanese language Effectiveness IT e rtion syd ti essio the speaker yd boau sd. I

整列集合の比較定理の証明をしたのですがこれで大丈夫なのでしょうか？添削またはおかしなところ、そもそもその証明は違うなど意見をください！！

3. 整列集合の比較定理の証明 Thm.11.5. 整列集合(W,≤) (W's')に対し、次のいずれか1つだけが成立する (1)W~ Wi (2) 'W', s.tw~W'<'; (3) news.tw<a>~w' Proof ①/wl=1 かつ |W'l=1 • W = {x} • W' = {x'} f:WW' fca)xと定義すると、fは順序全単射となる。 を したがってWW... (1) |wl=1かつ|WI≧2 W={x} ・xi=minw、 ・X2=min (w\{x}) f:WW'<X2'>をf(x)=xiと定義すると、fは順序全単射となる したがってW~W'<X> 111(2) ③|W=1 かつ IWI≥2 • W'= {x} x=min W •X2 = min (w\ {x}) f: W<X2> →W'f(x)=xと定義すると、fは順序全単射となる。 したがって W<X>~W ④ 1Wl=2 • . (3) 115 かつWI≧2 x=min w x=min W' . X₂ = min (w\{x}) . X2=min(W\{}) fW<X> W'<x^^'>をf(x)=x'と定義するとfは順序全単射となる。 したがってW<X>~W'<X>であり • W~W'<Xd> のとき (2) WW のとき (3) 以上からWW'の間には必ず(1)(2)(3)のいずれかの関係が成り立つ.

至急お願いします。 英語の穴埋め問題なのですが教えていただきたいです

Part 5: Incomplete Sentences A word or phrase is missing in each sentence. Select the best answer to complete the sentence. 51. Mr. Egan has offered New York. (A) making 52. (C) made the restaurant reservations for the annual meeting in (B) to make (D) being made A B C D low gasoline and diesel prices, the oil company plans to keep on expanding its domestic distribution operations. (A) Between (C) Except 53. Contrary to trip. (A) where (C) what (B) Despite (D) Unlike A B C D he actually had in mind, Lester spent all of his savings on his (B) which (D) that A B C D 54. In today's digital business world, IT networks must respond to progress in technology. (A) quickly (C) quickness (B) quick (D) quicken A B C D 55. We guarantee that delivery will be made 10 days after you place an order on the Web. (A) within (B) for (C) by (D) onto A B C D 56. The president team. the manager to hire three new employees for the accounting (A) intended (C) offered (B) provided (D) permitted A B C D 57. It is admirable that Ms. Arroyo wishes to handle all the transactions by (A) one (C) hers (B) her (D) herself 12 A B C D

アップグレードの20と21番なんですがふたつの違いがわからないです。解説読んでも（2枚目）あんまり違いがわからなかったです。何故20は過去完了形で21は過去形なんですか？かいせつおねがいします

文 UPGRADE 9 20. 頻出① had lived (in He (4) in Paris f Paris for ten years en years when the ② was living the war broke out. ③ lived ④ has lived (松山大) ② lived ④ have been living (東海大) 21. I() in New York for three years when I was a child. 発展 ① have once lived he ank J (01) med ③ had lived 316 been

教えて下さい お願いします

ng 形や色で ものをあ Today I'd like to speak on the topic of "learning Look at the car in the slide. What from nature." color is it? I can hear you say "blue." It looks blue, but actually blue paint was not used at all on this 5 car. Can you believe that? The color was created by copying the wings of Morpho butterflies. The butterflies are inhabitants of Central and South America. Their wings shine like blue jewels and we I can see them flying even from far away. This is an example of biomimicry. 2 "Biomimicry" means "copying ideas from nature." Idea Sharing 動物や昆虫 くことをあ adjust /ǝdzist adjust to..." In fact, plants and animals have adjusted themselves to the environment. So, if humans study and learn from them, we can adopt a more eco-friendly lifestyle. Let's look at another example of biomimicry that 5 helps us in our daily lives. Please look at the left slide above. It shows a gecko. You might see these little creatures walking on house walls and ceilings. A Japanese company got an idea from the gecko's sole and created a new, strong, sticky tape. adop /add: eco /ék エニ 10

至急⚠️ 奇数の問題の答え合わせをしたいです。 なぜその答えになるのかも教えていただきたいです。 よろしくお願いします。

EXERCISE A >> 空所に入れるのに最も適切なものを選びなさい。 of gabilat S 01 It is difficult ( ) the English exam. ①in passing ge2 to passed 3 to pass 4 pass 〈福岡大〉 ni miwa S to talk 2 talking 02 The young woman had no one ( ) with about her future. 3 of talking to have talked (*) 03 Susan opened the box, ( 2 next 1 but ) to find it empty. 3 only 4 soon lig 〈立教大〉 04 His grandfather lived ( ) ninety-two and was the head of the company for many years. 1 being 3 for being 105 2 to be 4 till he would be BE <東海大 > er It was careless (b) him to forget to lock the door. top bolid W 1 for 2 of 3 with on 08 4 to a don <*> 06 My friends were warned ( ) the mountain in such bad weather. 3 of no climbing to climb 〈センター試験〉 Din climbing 2 not to climb 107 Half of the houses on the island are said ( ①having 2 to be being 3 to have ) damaged by the typhoon. 4 to have been() of warts 80 The boy turned on his father's computer, though he had been told ( 〈 青山学院大 〉 ). 08 1 not do it 2 not to 3 to do not 4 to not 09 The textbook is ( 9D ①easy enough ) for a college student to read. 2 so easy as 3 so easy that 4 such easy (***) The 10 Mr. Smith doesn't know ( 1 way to use 3 the way of use ) a computer and is afraid to touch one. 2 how he should to use 4 how to use <東京経済大 〉 11 I can't decide ( I to if ) go to Australia or New Zealand. 2 whether ③3 whether to 4 to whether <福岡大〉 12 To begin ( 1 from ), let's have a look at Chapter 5. 2 by 3 for 4 with 〈九州産業大〉 □13 To ( ) the truth, I still haven't finished my homework. 1 say 2 tell 3 speak 4 mention 〈大阪学院大 〉 05 95 不定詞

高校の教科書の問題です。今度テストに出るところなので答えを教えて欲しいです！

Vocabulary 10 Compound nouns 1 Write a word to make three compound nouns. mail 1 business fire man 2 Write a compound noun from Exercise 1. ESSO 2 pop 3 rock 4 ache lights 2 1 gas station phones movie break 3 beans shop return 5 parking single 6 cut 5 6 brush salon for a headache gas 7 train 8 bus cook 9 text note 10 set glasses screen light cop jam 70 Unit 10 Our interactive world 7 8 3 Answer the questions using a compound noun. 1 When do people take aspirin? 2 If you want a recipe, where do you look? 3 Who delivers the mail to your house? 4 If you park in the wrong place, what might you get? 5 What should you put on your skin before you sunbathe? 6 What can you watch at the end of the day? 7 What must you switch on when you are driving at night? 8. Where can you get gas?