Mathematics Senior High about 1 yearago 3の答えが243[1ー(3ぶんの2)n] 4の答えが16[(2ぶんの3)nー1]なんですけどなんでですか?やり方教えてください🙏 【3】 次の等比数列の初項から第n項までの和 S を求めよ。 (1) 1, 3, 9, 27, Sn = 1x (3h-1) 3-1 (3) 81, 54, 36, 24, 3"-1 = 2 1/2(3-1) ((2) 2, -4, 8, -16, Sn = 2x {1-(-2)"} 1-(-2) (4) 8, 12, 18, 27, Unresolved Answers: 2
Mathematics Senior High about 1 yearago 高一数1です。解説お願いします🙏🙏 答えは½<a≦1 64 例題 23 **** 不等式 5(x-1)<2(2x+α) を満たす最大の整数xがx=6であるとき、定数αの値の範囲を求めよ。 D 8418-* Unresolved Answers: 1
English Senior High about 1 yearago marry の形がわかりません 12 1 cause (3) What did he ( 1 ask (4) The girl closely ( ①resembles (5) Could you ( I talk ) my dead mother. 2 resembles of ) me which one is his? 2 speak TRIAL 2 1》各文の( )に入る最も適切な語句を選び、番号を答えなさい。 ④forgive (1) We don't ( ) the students to have visitors in the dorm rooms after ten o'clock. 2 prevent allow (2) John's vast knowledge didn't ( 3 let ) him solve the problem. 2 save ) to you? Anything interesting? 2 say ④help 3 allow mudis blom ud ④tell 3 talk lew to easly s dal CEME (成蹊) (関西学院)) (学習院大) (2) You c (3) The feve 2 各文には (1) The d tree. 3 resembles to ④resembles with (4) I [101] (高千穂新大) tell (5) Ma 3 say (名古屋学院大) (6) We ( ) New York "the Big Apple." ④ call (6) E 3 speak 1 introduce 2 say [開催要 (金沢工業) 3 (7) Peter doesn't get ( 1 along ) well with his father. 2 forward 3 much ⑥to (東大) Hi I laid (城西大) 4 of lliw 5 sowi (8) After some hesitation, he () the book on the desk. 19mm) Em 2 lied dary lay mid (tog slote lain (9) We ( ) the matter for hours but came to no conclusion. 001\1800 1 spoke (10) He ( ①informed 2 discussed were ③3 discussed about 4 said ) his teacher of his success in the examination. bise boy ind 3 noticed molni) 'nb4 suggested gnise 2 reported (11) The poor old man was robbed (d) his money. for me to absood from? \bo al two o'c (中央大) 日本 (1) ted bis(**) 4 of (2 (南山大) married with 1 off (12) In the spring of 1985, Frank (109) Jennifer in a large church ceremony.b I married 2 married to hely 3 got married eloqa (13) A: Haven't you finished that report yet? B: ( badguel in bodigusi) siges ) me a few more minutes and I'll get it done. 2 Share 3 Take \ is srt of nateil of (センター試験) Wait 1 Give ☞(14) A college education will () you to get a broader view of the world. ad ei w(t>- 1 let (15) This computer cost ( 2 enable 3 make 4 take (京都産業大) ③ of me 4 for me her speech. (大阪産業大) A+ 3 with ④against ) my whole salary last month. 1 me 2 to me (16) Astonishment almost deprived the girl ( 2 at 1 of (17) The welfare office provides ①food with people in need 3 people in need with food (2) vast Hints! (14) broader 2 food people in need 4 people in need for food (8) hesitation (9) conclusion (16) astonishment (17) welfare ( 秋田県立大) Unresolved Answers: 1
English Junior High about 1 yearago (2)の問題、どうしてheじゃないんですか? himは 彼を(に) なのに (1) This cup isn't mine/ I / my }. (2) Bob plays tennis well. I like his / him/he}. (3) Is that { you/your/ yours } house? (4) I want to go with {vou / vour / youre } Unresolved Answers: 1
Chemistry Senior High about 1 yearago ⑴はどうやって解けば良いのですか 思考 化学 論述 グラフ 59. 分子間力■次の文中の空欄に適切な語句 100 上 (ア) (日) を入れ、下の各問いに答えよ。 (c) 50- 分子からできている物質では,状態変化を おこす温度は分子間力に大きく依存している。 分子間力のうち, すべての分子に働く弱い引 力を(A)とよぶ。 14~17族の水素化合物 の分子量 (分子の質量の相対値) と沸点の関係 BA を図に示す。 14族の水素化合物のように, 構 造のよく似ている分子では,(A)と沸点の間 に一定の傾向がある。 HF H2Te 0 AsH3 NH3 CN SbH3 H2Se 点-50 H2S HI (°C) SnH4 -100 GeH4 (イ)、 (エ) SiH4 HCI -150 ← 20 20 40 60 80 100 120 分子量(分子の質量の相対値) (1) 図中の (ア)~(エ)の化合物は何か。 それぞれ化学式で記せ- (2) 下線部について。 一定の傾向とはどのようなものか。30字程度で記せ。 (3) SiH4 HCI の分子量はほぼ同じであるが、 沸点はHCI の方が高い。 その理由を 極性分子, 無極性分子などの用語を用いて簡潔に記せ。 (d) (4)HF, NH3 の沸点が同族の水素化合物に比べて異常に高い理由を20字程で記せ。 -(ウ) T Waiting for Answers Answers: 0
Mathematics Senior High about 1 yearago 高二の数Bの問題です。至急です‼️‼️ ①の両辺にrをかけたとき後ろの方に (n-1)rⁿ-¹+nrⁿ が出てくるのかから最後までよく分かりません。 わかる方教えて頂けると幸いです! 例題 応用 5 9 解 等差数列×等比数列 r≠1 のとき, 次の和S" を求めよ。 Sn=1+2r+32 + 4r3+・・・+nrn-1 Sn=1+2r+3+4+・+nrn-1 ①の両辺にr を掛けて ① 0 rSn= r+2r2+3r+・・・+(n-1)n-1+nrn (2) ①から②を引いて (1-r)S=(1+r+r2+3+…+rn-1)nrn r≠1であるから (1-r)Sn == = 1-zn nnn 1-r = 1-rn-nrn(1-r) 1-r 1-(n+1)rn+nrn+1 1-r 1-(n+1)rn+nrn+1 (1-r)2 したがって Sn = Unresolved Answers: 0
English Senior High about 1 yearago この文ってwhenだからbeがついているのでしょうか? なぜbeが必要なのか教えてください🙇♀️ 6 Does Ann go to school by train? - Yes, she does. / No, she doesn't. 7 Didn't you visit New York? B <26> - Yes, I did. / No, I didn't. ☑ (26) (28) N 8 Are you going by air() or by train ()? (I'm going) By train. 9 Who painted this picture? - John did. (29) Hoiup (29) 10 What do you want for your birthday? I want a PC. (29) 11 When will you be back? (I'll be back) By five. IZ It is very cold today, isn't it? Yes, it is. N <29> <31> 13 Tom doesn't like math, does he? - Yes, he does. <31> 14 Listen to me carefully. (34) 15 Be careful! The cup is very hot. 04-CAD (34) 16 Don't give up. Try it again. (34) 17 Don't be so noisy, please. <34> 18 Let's play tennis. - Sure. / Sorry, I can't. <35> 19 How big this steak is! <36> 20 What a good swimmer (he is)! (36) □ 2 Unresolved Answers: 1
Mathematics Senior High about 1 yearago 極限の問題です。【ほぼ数B】青ペンで囲んだところが分かりません。どうやって現れたんですか?教えてください! 711 のとき limny" = 0 である。このことを利用して,次の無限級数の和 n→∞ を求めよ。 ただし, |x|<1とする。 n *(1) 1+ 2+ 3+ +1737 ・+ +...... 3n 3 9 27 (2) 1+2x+3x2+......+nx-1+...... Unresolved Answers: 0
Chemistry Senior High about 1 yearago 1枚目と2枚目の表を覚えて、3枚目のような式を立てるよう習ったのですが、どのようにして表を使って式を立てたらいいのでしょうか? あと、中性や塩基性などの下にかいてある式はいつ使えばいいのでしょうか💦 陽極が Cu, Ag 陽極が Pt, C ハロゲン化物イオン (Cl¯, Br^, I') を含む ハロゲン化物イオン (Cl, Br, I') を含まない 電極が陽イオンになって, ハロゲン単体が発生 溶け出す 2CI-→Cl2 ↑ + 2e- Cu > Cu2+ + 2e- Ag Ag+ + e- 酸化されやすさ 酸性・中性 2H2O → 4H+ + O2↑ + 4e- 塩基性(多量に OHがある場合) 40H→2H2O + O2↑ + 4e- H2O SONO3 Waiting for Answers Answers: 0
Mathematics Senior High about 1 yearago この計算どうやってしたか分かりますか?S -S nの計算です 64a a=1 === 111なので収束 S= Sn = / - 方 1-(1) 1-1 = b 7 n // {1-(方} 718-8-1 = 7 (ウ) n Unresolved Answers: 0