解答は①でした。 私は過酸化水素は基本酸化剤だけど、過マンガン酸カリウムと反応するときは還元剤になると暗記してて、①を選んだのですが、解答では各選択肢と反応したときの反応式を書いて判断してました。この手の問題を解くときは暗記ではなく反応式を書けるようにしておいた方が良いので... Read More

☆ 115. H2O2の反応 19 酸性水溶液中で過酸化水素と反応したときに、下線部の原子の酸化数が減 少する化合物を,次の①~④のうちから一つ選べ。 ① K2C07 SnCI, ③ FeSO4 ④ H2S [1999 追試]

(2)の問題なのですが累乗の和は()の中がn+1なのになんでこの問題はn-1になっているのかが分かりません。 赤線引いてるところで1番最初の赤線はちゃんと+1が入っているのに2個目の赤線では+1が入ってないのはなぜですか？？言ってることがごちゃごちゃですが頑張って読んで頂き... Read More

17:55 • 5G594 リアー 数学B =Sj=12-4・1=-3 Sn_1= (n2-4n)-{(n-1)2−4(n-1)} am=2n-5 -3であるから,この式は n=1の 立つ。 一般項は a=2n-5 01=S]=13+1=2 -Sm-i= (n+1)-{(n-1)+1} 3+1)-(n3-3n²+3n) 2=3n2-3n+1 にない。 であるから,この式はn=1のと よって、2のとき =3+2.12 (n-1)(n-1)+1}{2(n-1)+1} 4.1m(n-1)+3(n-1) =1n(n-1)(2n-1) -2n(n-1)+3n =1/23n(n-1)(2n-1)-6n-1)+9) ① すなわち a = n(2n²-9n+16) 初項は α=3であるから,この式は n=1のとき にも成り立つ。 n-1 a=a₁+ (3k²+ k=1 =0+3. = n(n − 1)((2n すなわち a=n²(n 初項は α = 0 であるから にも成り立つ。 ゆえに,数列{a} の一 したがって,一般項は am=n(2n2-9n+16) a = n²(n 70 (1) この数列の階差数列け 71 あ

exercise s1教えてください！

7 Not having finished her homework Lucy is still ン Exercises 1 Fill in the blanks so that each pair of sentences will have a similar meaning. Use "done," "not V-ing," or "having done." b enitte e.g. As I was shocked at the news, I didn't feel like eating anything. Shocked at the news, I didn't feel like eating anything. 01 1. Jack was given a bad grade, so he had to take extra lessons. Jack had to take extra lessons. 9 2. My sister wasn't busy, so she asked if she could go shopping with me. , my sister asked if she could go shopping with me. 3. Kate has visited many tourist sites, so she can give you some useful advice. Kate can give you some useful advice. 4. We had lunch at the cafeteria, and then we went back to the library. , W we went back to the library. T (2) Tell your classmates about something you did on the weekend. Use "done," "not V-ing," or "having done." e.g. Not having any plans on Sunday, I took a walk along the river. Having walked for two hours, I came across some fisherman cooking ayu over *charcoal. Te

3のn-1乗でくくるのはわかるんですがなんで括ったあとが3出てくるのかわからないです😭

(3)初項 α は a1=S=31-1=2 ① 00 n≧2のとき (I) an=S-Sn-1 =(3"-1)-(3-1-1)=3"-3-1 =3-1(3-1) すなわち a = 2.3"-1 ① より α = 2 であるから,この式はn=1のと

数B数列の問題です (3)の答えが何故一致しないのか分かりません。 2枚目写真ででイコールで繋がれている式を 回答▶︎イコールの左側の公式 自分▶︎ 右側の公式 出とこうとしました。どこが違いますか？？？

132 第1章 数列 *68 自然数の列を,次のように1個, 2個 4個 8個 21個 ・・・・・・の群に 分ける。 12,34,5,678, 9, 10, 11, 12, 13, 14, 15 | 16 ...... (1) 第n群の最初の自然数を求めよ。 (2)500 は第何群の第何項か。 (3) 第n群にあるすべての自然数の和を求めよ。 2 物

黄色マーカーの部分の文構造を解説していただきたいです。

intelligence that AI just doesn't get. Social and emotional intelligences, for 接する example-our understanding of different environments, how that influences our example our understanding 観察する feelings, and the way we observe and interact with other people based on how we believe they're feeling. So, a lot of it is about context. Our brains are in V ✓

there hasn't been rain という表現は可能ですか？教えて頂きたいです。 よろしくお願いいたします。

・「一滴の雨もない」 rigin soinu ni BB X since early spring We haven't had a drop of rain • There has been no rain at all コンマなし until how 完できるので冗長 It hasn't rained at all x It hasn't been raining 「ずっと雨が降り続いていたわけではない」のニュアンス → | x It hasn't been rainy 「雨が多くはない」という意味 × There has been no rainy day 文法的には正しいが, 使われない表現 eyewte ev'l × There has never been ... / We have never had... / It has never rained ...quor ev' 現在完了と共に用いると 「今まで一度も・・・したことがない」 という意味に 文 なる。 よって, 期間表現と共に用いることはNGとなる! see yabot

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,

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-*

marry の形がわかりません

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