60番の群数列の問題 もっと詳しく解説していただきたいです。 3枚目の線を引いたところで意味がわからなくなります困っています。

(4k-3) (4k+1) 図59 次の和 Sm を求めよ。 p.27 34 1) S=1・1+2.3 +33 +4 +・・・+n3"-1 Sm=1y+3 +5 +7.y +... +(n-1)·y" (r≠1) 60 自然数の列を次のような群に分け, 第n群には (2n-1) 個の数が入るようにす D p2835る。 ►B62, 63 1 | 2, 3, 4| 5, 6, 7, 8, 9|･･･ 第群の最初の項を求めよ。 (2) 第群のすべての項の和を求めよ。 1節・数列 135

この問題が分かりません 教えて欲しいです！

次の等比数列の初項から第n項までの和 Sm を求めよ。 22 (1) 1, 2, 22, 2, .... (3) 3, -6, 12, -24, ***** 1-2-2 2 2 2 (2)2, 332 33

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

赤丸と青丸のところの答えなんですか！！😭

Try it out! 下の語を用いて, 会話を完成させましょう。 1. "Mr. Suzuki ( last month." ) in Yokohama now." "Yes. Ihou there a long ) cars?" ) so nice." ) you an 2. "The view from upstairs ( way." ) beautiful." "Right. I can 3. "Her sons ( 4. "The store on the corner ( 5. "My friend ( email about it." engineers in a car factory." "Do they ) hot dogs." "They ( ) me your new address." "Sorry. I didn't ( sells/are/is/lives / told / repair / send / moved / smell / see

この( )に当てはまるものを教えて下さい🙏分かるものだけで構わないので助けてください😭お願いします。良かったら答えの意味も教えて下さい。

(1) My daughter will spend a few years in New York. Her main ( is to study Broadway musicals there. ) for going 1 behavior 2 reason 3 accident 4 subject (2) A: Did you ( ) Jane's new boyfriend? B: Yes, I was surprised that he is so handsome. 1 acquire propose 3 bring 4 notice (3) A: Does Japanese food suit your ( B: Yes, very much. I really love it. )? 1 lips 2 dish 3 taste 4 spirit (4) A: I think that this plan will be successful. B: I don't want to ( 1 argue 2 insist ) with you, but I'm sure it won't. 3 demand 4 hope (5) A: Where do you want to go tomorrow, Dean? B: How about the beach? The roads won't be too crowded if we leave ( ). 1 early 2 quickly 3 fast (6) Since the ( 4 speedy ) of China is so large, Chinese is spoken by more people than any other language. 1 people 2 population 3 number (7) A: I'm very sorry I have not written to you for so long. B: I'm sorry, too. I want to ( (8) (9) 1 save 2 introduce 4 nation ) to you for getting so angry. 3 apologize 4 understand ) to the crop. 3 harm 4 loss We hoped the typhoon would not do any ( 1 pain 2 accident A: What about your schedule for this week? B: It's very ( ). 1 tight 2 small 3 close 4 strict

数C複素数平面の問題です。 （２）、（3）が解答を見ても、なぜこの式になるのか 分かりません。 考え方を教えてください。 テスト範囲なので早めに答えていただけると ありがたいです。

B ] 258 次の複素数を極形式で表せ。偏角0の範囲は 0≦0 <2π とする。 **(1) 3+2i 1+5i] (2)-(cosmo+ising) (3) sin notic π sinzo+icos 6 ①

2枚目(1)が問題文です。 一枚目赤線までは分かったのですがどうしたら青線になるのかが分かりません。 お願いします。

60 与えられた数列を {an} とする。 (1) 第ん項は初項 2, 公差 2, 項数 kの等差数列の 和であるから =1/12k22+(k-1).2)=(k+1) ak= S≤R よって, 求める和 Sm は n n n n S„ = 2 k k + 1) = 2 ( k² + k) = Σ k² + k S=k(k+1)=k2k2k2+k k=1 k=1 k=1 -1/2(+12 +1+1/+1) = 6 1 (2n+ on(n+1){(2n+1) + 3} k=1 1 n(n+1)(n+2) 3 のと

教えてください！

リウム物 (7) 浸透圧が 1.5mOsmLである塩化カルシウム水溶液を200mL作るには、塩化カルシウム・2水和物が何mg 必要か、 次の中から最も近いものを選びなさい。 ① 1.5 0.3 ② 10 15 ④ 100 150

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?

わかる方教えてくださいください

14 2012 This theory ( ①supports 2013 19 ) by a lot of scientists. supported 3 is supported has supported The newborn baby ( ) after its grandfather. ①named John ③has named John PLOT as 2 was named John named John by 17901 )ed nodw rebnowl (some tourists/I/to/ was / by / spoken) on my way home. 15 A general election ( ) next month. Dis holding will hold 3 will be held will be holding 6 You can't drive here because the road ( ) now. Dis repairing 2 has been repairing 3 is being repaired has been repaired The director ( ) the Oscar several times. ①has awarded 2 has been awarding 3 has been awarded Dis being awarded (be/is/to/he/the model / said) for the main character in the novel. Ms. Smith is known ( ) the study of Japanese culture. Dabout aland's ②for 3 of Fabiby ④with ☐