2行目から3行目の変形で、なんでΣ(n~k)k=1/2n(n+1)を使わずにnをkに代入して解けるんですか。

= k=1 24-1 (1)ゴーカ (n+1)2-1-2-2 n 1-2" = k 2' k=1 Jk. 2* - - Finl 1-2

Andy came home every day from school to find something broken by Buddy. この文の訳が、 アンディーが学校からかえると毎日、何かがバディによって壊されているのがわかった なのですが、to不定詞の部分の訳... Read More

At first I thought I was lucky to find a good place to see the parade. However, the woman behind whom I was sitting was wearing a big hat... Read More

30メートルの高さから上に45m/sで投げられた石はいつ最高到達点につくのか見つける問題です。式はh(t)=-4.9t^2+v0t+h0　(v0は最初のスピード、h0は最初の高さを表します。) 解き方と答え教えてください🙇‍♂️

18436 18. A stone is thrown with an upward velocity of 45 m/s from a building 30 meters high. Find its height above the ground t seconds later if height can be modeled by h(t)=-4.9t²+vt+h, where v 30 = the initial velocity (m/s) and h₁ = initial height (meters). When does the stone reach the same height that it was thrown? h = -49++Vot+h 4.9t 45 t 30-4at 45++30 0= -4.9€²+45+ Hat 45 ta.1837 Hat² = 45t When will the stone reach its highest elevation? 2 h-Hat +45t +30 9,18 sec

5のeconomic がダメな理由を教えてください

(5) I've come to think that buying ①in bulk is more economic than shopping for small ④quantities. (6) While many people find Dbe in the water relaxing, ③others find it stressful. (7) The word amphibian comes from a Greek word ③means “①living a double life." (8) There were ①more fire victims last year. 2 with hundreds of neonl

Let's find out what exactly Copenhagen has been doing. この文のexactcyはなんで関係代名詞節の文より前に出てきてるんですか？あと訳し方もわかりません。コペンハーゲンがしてきた正確なことを探しましょう……？？

至急！！明日提出のものなので答え教えて欲しいです！

1( )に入れるのに適切な語 (旬) を (a)~(d)から1つずつ選び、記号を○で囲みなさい。同 (1) "() I smoke here?" (a) Must - "No, you can't." (b) Should (c) May Marit ni alid) Ought Toiste aid ) worry so much. She'll be fine. (2) You ( (a) had better (3) He ( (a) would go p.166 (4) He ( (b) can't beegold ROS L-10 (c) don't have to Jon (d) would alq ad foods blot 'naw 14 ) to the museum, but now he hardly ever goes. (b) used to go (c) used to going ) the train. It's already 8:30, (a) may have missed (b) may missed (d) would used to go and he hasn't shown (c) may misses up yet. (+ d) (5) Something was wrong with the door. It () not open. ((a) has (b) must (d) may have been missed ): ner (c) shall red yd to (d) would hip sdT (6) He () be hungry because he has just eaten a lot. (a) must (b) should st eaten a lot. of word i izumed < (c) can't red (7) They (her) have been tired after so much hard work. (a) would rather (b) can (c) cannot diw bo (d) will ANY C (d) might S 20 Smuseum wan edit not aseodo esw mgiesb 320W C He () not come to school today. (8) Tom was sick yesterday. He ( ((a) might 65 (9) You ( (a) will be (b) ought ) run in the hall.+Red+M):84** Lo (c) will have anal (d) had lliw STOW Lt[] (b) used (c) needs AJEC (d) mustn't Oliud solid aidi now 4 (10) He tried to solve the problem alone, but he (+)+ (a) won't (b) can't (c) mustn't w + (d) couldn't

文法の問題です！ Many people find the convenience of this way of learning extremely useful, as they can fit studying around their lifestyle. このfi... Read More

二次試験の練習をしています。よろしければ、アドバイスおねがします。 1.He founded that his classmates playing in the park and they spent high quality time in there ,so he ... Read More

... eigonotomo.com Your story should begin with the following sentence: One day, a boy walked by a park on his way to his violin lesson. Ten minutes later I can't do this! You need to practice more. ② Later that night The following week 目 (4) (3) 課題 12% Parent- ||| Teacher Conference Your son is smart but he can't make friends TOP

⑵あっていますか？💦

5 関数 f(x) ax x²-2x+2 ;があり、f'(2)= == を満たしている。このとき、次の問いに答えよ。 ただし αは実数の定数であ る。 (20点) (1)q の値を求めよ。 また, 極限 lim f (x) を求めよ。 →80 (2) 関数 f(x) について、増減を調べ, 極値を求めよ。 また, 曲線y=f(x)の漸近線を求め, グラフの概形をかけ。 ただし, 凹凸は調べなくてよい。