数列の、等比数列です！大問42の、(2)の問題です。解説の写真にチェックしたところで、なぜ81/1が(1/3)4乗ではなく、(-1/3)4乗と、−がつくんでしょうか、、。それと、最終的な答えの122になるやり方を教えて欲しいです。可能であればすぐに教えてくれたら嬉しいです🙇... 続きを読む

5 等比数列の和 ◆等比数列の和 初項a,公比rの等比数列の初項から第n項までの和 S, は a(1-r") Sn= y=1のとき a(r"-1) または Sn= 1-r r-1 x=1のとき Sn=na TRIAL A 40 次のような等比数列の初項から第n項までの和 S, を求めよ。 *(1) 初項2、公比3 *(3) 3, 3², 3³, 34, ...... (5) 7, -7,7, -7, 第1節|等差数列と等比数列 *(2) 初項 21,公比 2 1 1 1 3'32' 33, *(6) 4, -2, 1, 1/1/2 (4) 1, 1. 42 次のような等比数列の和Sを求めよ。 (1) 初項1,公比 2 末項 64 *41 次のような等比数列の和Sを求めよ。 (1) 初項20,公比 -2, 項数10 (2) 初項 5,公比1,項数 8 * (2) 初項162,公比 →教p.20 例題7 TRIAL B 43 次のような等比数列について, [ ]内のものを求めよ。 (1) 初項 5,公比 2,和 315 [項数] *(2) 公比-2,初項から第10項までの和が-1023 [初項] →教p.20 例題 7 末項2 44 初項が1,公比が3である等比数列{an}がある。 (1) 第何項が初めて100 を超えるか。 *(2) 初項から少なくとも第何項までの和をとると1000を超えるか。 ヒント 42 (1) 末項を第n項とすると1・2"-'=64 123 第1章 数列

九州大学英語2019年の英作文の添削をお願いします🙇‍♀️ 大問4が要約と英作文、5が和文英訳です！🙇‍♀️🙇‍♀️🙇‍♀️

〔4〕 九州大-理系前期 Read the following newspaper article and follow the instructions below. (36) 16 2019年度 英語 in Engligi taul" According to the Kanagawa Prefectural Police Station, a 20-year-old female university student caused a traffic death. The student was riding on a power- She moved off from an assisted bicycle when the accident happened. intersection and started riding on the sidewalk. At that moment, a 77-year-old lady was walking on the sidewalk and moved toward the bicyclist. The student hit the lady. The collision caused the lady to fall and strike her head. She was transported to hospital, but died of her injuries two days later. At the time of the incident, the student was apparently holding a smartphone in her left hand and a drink in her right while steering the power- assisted bike. Moreover, she had an earphone in her left ear. Therefore, police arrested the student for breaking the new law and riding recklessly. Police are investigating whether the student noticed that the old lady was walking toward her. They suspect that she was not paying sufficient attention because she was operating her smartphone right up until the collision. Her court appearance date has not been decided yet. The Mainichi, December 16, 2017 Instructions: Write two well-developed paragraphs in English. In the first paragraph, summarize the main points of the newspaper article above in lo approximately 100 words. Use different vocabulary and sentence structure from the original passage as much as possible. In the second paragraph, write your opinion about what should be done to reduce accidents like this in approximately 50 words. hosidinlong unich lor, condadnoah

九州大学英語2019年の英作文の添削をお願いします🙇‍♀️ 大問4が要約と英作文、5が和文英訳です！🙇‍♀️🙇‍♀️🙇‍♀️

〔4〕 九州大-理系前期 Read the following newspaper article and follow the instructions below. (36) 16 2019年度 英語 in Engligi taul" According to the Kanagawa Prefectural Police Station, a 20-year-old female university student caused a traffic death. The student was riding on a power- She moved off from an assisted bicycle when the accident happened. intersection and started riding on the sidewalk. At that moment, a 77-year-old lady was walking on the sidewalk and moved toward the bicyclist. The student hit the lady. The collision caused the lady to fall and strike her head. She was transported to hospital, but died of her injuries two days later. At the time of the incident, the student was apparently holding a smartphone in her left hand and a drink in her right while steering the power- assisted bike. Moreover, she had an earphone in her left ear. Therefore, police arrested the student for breaking the new law and riding recklessly. Police are investigating whether the student noticed that the old lady was walking toward her. They suspect that she was not paying sufficient attention because she was operating her smartphone right up until the collision. Her court appearance date has not been decided yet. The Mainichi, December 16, 2017 Instructions: Write two well-developed paragraphs in English. In the first paragraph, summarize the main points of the newspaper article above in lo approximately 100 words. Use different vocabulary and sentence structure from the original passage as much as possible. In the second paragraph, write your opinion about what should be done to reduce accidents like this in approximately 50 words. hosidinlong unich lor, condadnoah

至急回答お願いします🙏英語です

At this robot cafe,humanoid robots ア serve_customers.These robots can take your orders and bring your drinks. They are operated by people with severe physical disabilities, so they can work outside even if their real bodies are at home.イ [were robots by these created] Yoshifuji Kentaro. By_(______)__his robots, people with disabilities can participate more in society even if they cannot go outside. 問題 14 未解答 (1) 下線部アについて、ここでは具体的に何を することを表すか。 選択肢より選べ。 1つ選択してください: ○ 注文を聞き、 飲み物を作ること ロボットを操作すること 注文を聞き､飲み物を運ぶこと

共テ1a大問4です。写真のケの問題きついてですが、解説の赤線部の意味がわからないです。①なぜ「f(p)=2f(p)-1」と表せるのですか？ ②垢全部の下の式ではf(p)=f(2p)となっていますが、なぜ、f(p)=f(2p)と書き換えられるなでしょうか？以上の2点について解... 続きを読む

大問4の解説お願いします

4 次の例を参考に (1)~(6) の問いに答えよ。 [例] 水素原子 H1.5×102個は何gか。 H=1.0 [解答] 粒子の数量の計算では,まず物質量を求めるとよい｡ 1.5×1023 物質量は, =0.25mol 6.0x1023 / mol 質量は, 1.0g/molx0.25mol = 0.25g [例2] ダイヤモンド C1.2gに含まれる炭素原子Cは何個か。 C=12 =0.10mol 解答 物質量は, 1.2g 12 g/mol 粒子の数は, 6.0x1023/mol x 0.10mol =6.0x1022 (個) (1) 銀原子Ag3.0×1024個は何gか。 Ag = 108 (2) 水分子H2O1.5×102 個は何gか。 H=1.0, 0=16 ( (3) カルシウムイオン Ca²+ 6.0×1024個は何gか。 Ca=40 (4) Fe 2.8gに含まれる鉄原子は何個か。 Fe=56 [ (5) アンモニア NH3 8.5g に含まれるアンモニア分子は何個か。 H=1.0, N=14 [ g bo ] g. 個 ( ] 個 (6) 炭酸ナトリウム Na2CO3 1.06gに含まれるナトリウムイオン Na+は何個か。 C=12, 0=16, Na=23 〕個

高校数学の問題です 解き方と答え教えてほしいです、🙏

3 次の2つの整数の最大公約数を求めよ。 (1) 24,42 #0000 ,008 (2) 300, 450 4 次の2つの整数の最小公倍数を求めよ。 (1) 65,78 (2) 36,234 $334350S 06 48 (RA) 5 次の5桁の自然数が9の倍数であるとき, 口に入る数をすべて求めよ。 (1) 69450 (2) 31207

分かる方いたら教えてくださいт  ̫ т

大問4 以下の空欄にあてはまる数値を 答えなさい。 (数値のみ答えよ。) 円周上に異なる8個の点がある。 そのうち4個 を選び、それらを頂点とする四角形をつくると き、( ) 通りの四角形ができる。 解答:

英語の論理表現の問題です 大問4の4の並び替え問題についてです この問題のuselessの使い方について教えてほしいです！

3 ite! 2. 1. 3. 4. 4 15 6. 3. 次の英文を日本語に直しなさい。 1. ) dangerous ( 各文の下線部と同じ用法の不定詞を含む文を(a)~(d)から選びなさい。 I will go to the stadium to see a soccer game. (a) (b) I'm sorry to bother you, but there is a phone call for yo He can't be kind to other people to tell such a bad joke He made a promise to send me an email every day. We should leave soon to get there on time. There was nothing to eat in the refrigerator. My sister was looking for a company to work for You should grow up to be kind people. It is important to help each other. He had three children to look after. (c) (d) He went to the bookstore to buy the comic book. I want to be a nurse in the future. He tried, only to find he couldn't solve the problem by hir She needs a bigger house to live in. 4 ( 内の語句を並べかえて, 英文を完成させなさい。 1. I ( planning/ a three-day trip/to/am/to Kanazawa/take ). 2. Tony (the/speak/to/ability/three languages/has). X He must (to/ a mistake/tired/be/make/such). (useless/I/to/it/talk/think) to my mother about it. 5. (receive/were/to/a warm welcome/the tourists/delighte 6. Takashi (Canada/to/in/stayed/his/improve ) English. 総合 1. 彼女には洗わなければならない服がたくさんある。 2. 私は目が覚めたら部屋に一人ぼっちだった。

この大問4の（2）と（3）の解説を詳しく教えて頂けると嬉しいです。 また青マーカーの部分の意味（③の範囲の整数がただ2つの時なぜ5と6がわかるのか、次の式には<7と7が出てきたのはなぜ）も教えて頂けると幸いです🙏🏻

標準 応用 x+3 2 不等式 - 4 Mox-1.①, ただし,αは定数である。 x - 2a 3 S x-4 ･･②がある。 @2x = = = /100 EXCH ELA (1) 不等式 ①,②をそれぞれ解け。 ②x=5a-6. 不等式①と②を同時に満たす整数がちょうど2個存在するようなαの値の範囲を求めよ。 2次方程式x-2a+1)x+α² +a=0の2つの解がともに不等式①と②の共通範囲内にあ るようなαの値の範囲を求めよ。 1