数列の和の範囲です。 解き方が分かりません。教えてもらえると助かります

T (2n-1) • X™ (x = 1) Sn=1.xn-1 +2.xn-2+3.xn-3+ ...+(n-1)x+n.1 (x> 1). (3) 例題 71 階差数列の応用 TU ~ T

至急です！！ (3)の問題が分かりません

425 実数x,y,zが2x+5y-4z=9, x+3y-3z = 5 を満たすとき (1) xyzで表せ。 (2) x2+y2+z2が最小となるx, y, zを求めよ。 (3) x2+y2+z^2が最小となる整数x, y, z を求めよ。 Wnst Bapp Snie (1) [大阪

至急です。この問題が分かりません。式と答えを教えて欲しいです。シグマ、等比数列の応用の範囲です

問題1 次の値を求めよ。 5 100 (1) Σ3k, (2) Σ(3k+4), (3) Σ(-2k-3), (4) Σ(3k+4) k=1 k=1 10 ● 数列 等比数列の応用編- 問題2次のような等比数列{an}がある。 k=1 10 4 { ¹, ½, (²) ² (²) ³ (!) * · · · · } k=4 (1) この数列の第n 部分和 Sn を表せ。 (2) 和の項数n が限りなく大きくなっていったらこの和はどんな値に近ずくか考えよ。 問題3 背の高さがはじめ1 [m]の木がある。 この木は翌年には1/28 [m] 伸びて、そのまた翌年 には 21 [m] 伸びるという具合に、伸びる長さが前年の半分になっているとする。この木はい くら成長しても2 [m] を超えないことを示せ。 問題2の結果をヒントにせよ。

空欄を教えてください！ 片方の写真は本文です

LESSON 14 [T-F Questions] 1.) These days, fake news is everywhere, and compared to the past, false stories spread easily via SNS. 2. (f) With the development of social media, people have come to trust the mainstream media even more than before. 3. (F) Japanese are now unable to spot fake news and accept real news stories without doubt. [Comprehension Questions] <Paragraph 1> 1. What did an SNS alert message say? 11 said 2. When was the message posted? was W was A lion has escaped from posted 3. What was attached to the message? <Paragraph 2> 4. How do false stories spread? They spread <Paragraph 3> 7. What do they accept? shortly after the devastating earthquake in kyushu. via 5. In past decades, what did we trust? We 6. Why has trust in the mainstream media been declining? with the attached a photo of a lion on the loose. SNS 200 trusted established news papers. magazines 9. What should we judge credibility by? No.1 near my home in Kumamoto. They accept social media headlines and photos 8. How do most teens judge the credibility of a news related message? the development of large-scale social media has and TV news programs. without doubt.

8、9教えてください

LESSON 14 [T-F Questions] 1.) These days, fake news is everywhere, and compared to the past, false stories spread easily via SNS. 2. (f) With the development of social media, people have come to trust the mainstream media even more than before. 3. (F) Japanese are now unable to spot fake news and accept real news stories without doubt. [Comprehension Questions] <Paragraph 1> 1. What did an SNS alert message say? 11 said 2. When was the message posted? was W was A lion has escaped from posted 3. What was attached to the message? <Paragraph 2> 4. How do false stories spread? They spread <Paragraph 3> 7. What do they accept? shortly after the devastating earthquake in kyushu. via 5. In past decades, what did we trust? We 6. Why has trust in the mainstream media been declining? with the attached a photo of a lion on the loose. SNS 200 trusted established news papers. magazines 9. What should we judge credibility by? No.1 near my home in Kumamoto. They accept social media headlines and photos 8. How do most teens judge the credibility of a news related message? the development of large-scale social media has and TV news programs. without doubt.

8、9教えてくださいm(_ _)m

LESSON 14 [T-F Questions] 1.) These days, fake news is everywhere, and compared to the past, false stories spread easily via SNS. 2. (f) With the development of social media, people have come to trust the mainstream media even more than before. 3. (F) Japanese are now unable to spot fake news and accept real news stories without doubt. [Comprehension Questions] <Paragraph 1> 1. What did an SNS alert message say? 11 said 2. When was the message posted? was W was A lion has escaped from posted 3. What was attached to the message? <Paragraph 2> 4. How do false stories spread? They spread <Paragraph 3> 7. What do they accept? shortly after the devastating earthquake in kyushu. via 5. In past decades, what did we trust? We 6. Why has trust in the mainstream media been declining? with the attached a photo of a lion on the loose. SNS 200 trusted established news papers. magazines 9. What should we judge credibility by? No.1 near my home in Kumamoto. They accept social media headlines and photos 8. How do most teens judge the credibility of a news related message? the development of large-scale social media has and TV news programs. without doubt.

8、9教えてください！！ 早めにお願いします

LESSON 14 [T-F Questions] 1.) These days, fake news is everywhere, and compared to the past, false stories spread easily via SNS. 2. (f) With the development of social media, people have come to trust the mainstream media even more than before. 3. (F) Japanese are now unable to spot fake news and accept real news stories without doubt. [Comprehension Questions] <Paragraph 1> 1. What did an SNS alert message say? 11 said 2. When was the message posted? was W was A lion has escaped from posted 3. What was attached to the message? <Paragraph 2> 4. How do false stories spread? They spread <Paragraph 3> 7. What do they accept? shortly after the devastating earthquake in kyushu. via 5. In past decades, what did we trust? We 6. Why has trust in the mainstream media been declining? with the attached a photo of a lion on the loose. SNS 200 trusted established news papers. magazines 9. What should we judge credibility by? No.1 near my home in Kumamoto. They accept social media headlines and photos 8. How do most teens judge the credibility of a news related message? the development of large-scale social media has and TV news programs. without doubt.

なんでこれこうなるかわかりません ずれてるのって4分のパイじやないんですか？

□ 351 右の図は関数 y = sin(a0-b) のグラフの一部である。 定数 α, b の値を求めよ。 ただし、 何通りもあ るならば、その正の最小値を答えよ。 π 4 π 2 47 π 0

答え教えてください🙇‍♀️

Grammar 文法に強くなろう! A 例にならい、 枠の中から適切な単語を選び、 必要な場合は適切な形にして次の1~4の文を完 成させましょう｡ 15: Don't make so much noise. We ( are studying) now. 1. I have to go now. It ( ) late. ) heavily when we went out. 2. It ( 3. What's so funny? Why are you ( 4. "What does your mother ( B 例にならい、 イラストの状況に関する質問に答えましょう。 Is she teaching English? No, she isn't. 1. Does she teach English? 2. What is she doing? 2) ? )?" "She's a nurse." 3. What does she do? I'm an English teacher. study ✓ laugh get do snow Let's 次のパッセー Av at th cour does 201 lan of to A

この問題が分かりません。式と答えを教えて欲しいです。シグマ、等比数列の応用の範囲です

問題2次のような等比数列{an}がある。 1 2 3 4 { ₁, 2, (²) ² (1) ³ (1) ^ - - · · } う (1) この数列の第n 部分和 Sn を表せ。 (2) 和の項数nが限りなく大きくなっていったらこの和はどんな値に近ずくか考えよ。 問題3 背の高さがはじめ1 [m]の木がある。この木は翌年には1/12 [m] 伸びて、そのまた翌年 には 1 [mm] 伸びるという具合に、 伸びる長さが前年の半分になっているとする。 この木はい くら成長しても2 [m] を超えないことを示せ。 問題2の結果をヒントにせよ。