赤く印したところ同士が同じものを示しているのはわかるのですが、なぜA×Bがこれらの式で表せるのかわかりません。なぜですか

5) A= Ai+Ayj+A,k, B= B,i+Byj+B,k ならば A×B= (A,B,-A,B,)i+(A;B.-A,B.)j+(AzB,-A,B.k (2.1) 5)は4)を使って示すことができる。 行列式(2-4 節で述べる)の記号と思いれば, ペクトル積は、 |4, A, j+ Bs |Az A |Ay A.| B。 Bu A×B- B, B。 三 i j k (2.8 =| A』 A, A,

分かる方教えていただきたいです。

3 GRAMMAR A Complete the sentences with was, were, in, or ago. Alan Turing (1) a computer scientist. He born in London over 100 years (3) 1938, he got his PhD from Princeton University. During World War II, he (5) . a code breaker for the British government. Thousands of people (6) saved because of his work. Turing and his coworkers (7) heroes. Turing died (8) 1954. B Make the sentences negative. Example: My grandfather was famous. My grandfather was not famous. 1. The Baker sisters were musicians. 2. Henry Ford was a doctor. 3. The sky was clear last night. 4. The children were excited. 5.I was confused by the first question. c Complete the conversations with was, wasn't, were, or weren't and the subject, if necessary. Example: A: Was Jenna in class yesterday? B: No, she wasn't She at home. was 1. A: Steve and Julia at the beach on Saturday? B: No, They at the library. 2. A: Carlos at the pool last night? B: No, He in his office. 3. A: your brother in Los Angeles last year? B: Yes, 4. A: Mr. and Mrs. Parks in California on vacation last week? B: No, They in Rome. 5. A: you B: No,

解答がなくて困っています。 わかる方教えて頂きたいです

| VOCABULARY A Circle the best word to complete each sentence. 1. Educators / Travelers teach people. 2. Doctors / Authors write books for a living. 3. Politicians / Explorers lead research trips. 4. Speakers / Scientists give presentations to people. 5. Musicians/ Ambassadors work for the government. 6. Founders / Activists run their own companies. B Which word is different? Cross out the word that doesn't fit. Example: scientist speaker researcher 1. teacher educator activist 2. director traveler leader politician ambassador 3. doctor explorer author 4. writer C Complete the sentences. Use words from A and B. There may be more than one correct answer. need passports. 1. talk to large groups of people. 2. try to change the world. are leaders of companies. 3. 4. discover new things. 5. Which jobs require a person to be brave? Explain your answer.

解き方教えてください🙏

(2) 関数 f(x,y)= 2°- 12.ry - 8y + 3? について極値を調べる。 ただし H=fmfyy - (Jay)? とする。 *(エ,9) = (-| カ キ)のとき fェ= f, = 0, H= ク > 0, faz =-| ケ <0 となるので極大値f= をとる。 コ

TOEFLの誤りをひとつ選択する問題です。37の答えはCなのですが、正しく直すとどうなるかがわかりません…どなたか教えてください🙏

35. Electric lamps came into widespread use during the eariy 1000 replaced once-popular type of fat, gas, or oil lamps for almost every purpose. A B C D 36. Located in Canada, the Columbia Icefield covers area of 120 square miles and is B A 3,300 feet thick in some places. TviO 2oie abaoob C D 37. Composer Richard Rodgers and lyricist Oscar Hammerstein II brought to the musical allivieM oecmnoH A Oklahoma! extensive musical and theatrical backgrounds as well as familiar with the C d B traditional forms of operetta and musical comedy. D aha 38. Although traditional fiutes are among the world's oldest musical instruments, but the 0 09nel B tong To yodmt odt of bosh A flute used in orchestras today is one of the most technically sophisticated. C D 10oeo to auoilim abnid boeoleyo is te ybd ondes 39. Rice, which it still forms the staple diet of much of the world"'s population, grows B A nd aue best in hot, wet lands.

この画像が何を主張しているのか教えてください🙏

GLOPE DEITY {CHAIST SALVATIUN FAITH Cont nig rnley 「p G00 「VRGIN BIRTH Jesus Christ ATONEMEN CROSS BL00D This is the kind of bridge they'd have us cross."" 細長い部分の文字:BIBLW WRITTEN BY MAN/ EDUCATION/ SALVATION BY WORKS/ NATURAL BIRTH/ NO HELL/ EVOLUTION ブロックの中の文字:INFALLIBLE WORD OF GOD/ CROSS/ VIRGIN BIRTH/ ATONEMENT BY BLOOD/DEITY OF CHRIST/OTHERFOUNDATION CAN NO MAN LAY/JESUS CHRIST/ SALVATION BY FAITH VFALLIBLE

問題をやったのですが絶対に違うと思うので直して欲しいです😭😭難しくてわからなかったので教えて欲しいです🙇‍♀️🙏

Exercise 3.2 Would, Used To, or Simple Past? Complete the article about life before electricity. Use used to or would and the verbs in parentheses, or use the simple past form of the verbs. Sometimes more than one answer is correct. Alessandro Volta_invented_(invent) the first battery in 1800. How_did people _use to live_ (live) in the days before electricity? Voltaic battery Most people Lused to burn (burn) oil lamps or candles for light. When it got cold, they_Used to make (make) open fires to keep warm. People _diolu'tot travel_(not travel) long distances. Most people only_would visit (visit) neighbors or nearby relatives. Before Volta's battery, many scientists_woud uot Think (not think) that electricity was useful. And in the early days of electricity, some people_(used to think (be) afraid of it. Some people (think) it was dangerous. They _Used ro be Lwould belleve (believe) that electricity had a bad effect on society. They even (10) Science and Society 63

(5)の問題が分かりません。 教えてくれる方お願いしますm(_ _)m

クトルをあとし、拡大情長 44 a (5) aを定数とするとき, 行列 A=|4 a 4の階数を求めよ。 a 4.4 RT SE 110

一行目の英文の訳と分の構造を教えていただきたいです よろしくお願いします What more could you have done to slow KD down? ※KDは選手の名前です

22:19 il Q: What more could you have done to slow KD down? Patrick Beverley: Whatcha think? You play basketball before he's Kevin Durant. Lou Williams: Sometimes you come across special people. It doesn't matter what you send at them. No scheme. No defense. ツイートを翻訳

5の③はHe is のis をcan'tに変えればいいのですか? また5の1.2.4はあっているか確認してほしいです。

5次の文を( )内の指示に従って書き換えなさい。 1. Imust read this book. (「~する必要はない」 という意味の文に) _I dontt have to read this book. 2. She must bring her own lunch. (「~しなければならないだろう」 という意味の文に) She will have to bring her own lunch 3. He is telling the truth. (can't を使って「~ (である)はずはない」 という意味の文に) 4. Ask Jane. She knows his phone number. (「~かもしれない」という意味の文に) Ask Jane. She may know his Phone _number .