写真見づらくてすみません。 数Ⅲ 積分 模範解答は理解できます。 が、ノートの考え方はどうして上手くいかないんでしょうか？(-π/2からtの面積からTを引いた値とtからπ/2の面積にTを足した値が等しくなることを使って2次方程式を解く) 左辺に集めた式が模範解答でいうSにな... Read More

重要 例題265 面積の2等分 曲線 y=cosx (x)とx軸で囲まれる図形をEとする。曲線上の点 形の面積が等しくなるとき, costの値を求めよ。 (t, cost) を通る傾きが1の直線 l で E を分割する。こうして得られた2つの図 [電通大〕 基本256 指針図形Eのうち直線ℓより上の部分の面積を S1, 下の部分の面積を 2 とすると,問題の条 件は Sı=S2 である(解答の図参照)。しかし,ここでは計算をらくにするために,図形E の面積をS(=S+S2) として, 条件 S=S2を, SiS または 2S=S と考えるとよい。 CHART 面積の等分 S=SかS=2S=2S2 計算はらくに 435 8章 38 面積 解答 直線 l が図形E を分割するから 一覧 π <t< 2 2 YA 図形の面積SはS-facosxdx=2500 2f® cosxdx=2 cost 1 y=c0S 直線 l の方程式は 2 ST S2 y-cost=l(x-t) O t すなわち y=x-t+cost ...... ① 12 t-cost 直線 l が図形E を分割するとき, 直線lより上の部分の面積を S, 下の部分の面積を 2 とする。 直線 l と x 軸の交点のx座標は,① で y=0 とすると, x=t-cost であるから π S2=1/12t-(t-cost)}cost+S cosxdx 2 <2S2 = S として考える。 2S=S とするときは, 求める条件は 2S2=S ゆえに $100+1 =1/2/cost+[sinx -/1/cos't+1-sint cos2t+2-2sint=2 Si=S_cosxdx 2 01-05-10) (t-(t-cost))cost を用いる。 すなわち cos2t=2sint ②の in't を用いて整理すると sint+2sint-1=0

Jessica is aware that when I feel lonely, I often spend time by the riverside. 私が寂しい気持ちのときに、よくその川辺で過ごしていることをジェシカは知っている。 Workers in that f... Read More

（）から適切なものを選ぶ問題です。 Alice （thinks / is thinking）of morning to New York to work. I （think / am thinking）that's good idea. it's hard to find... Read More

至急！英検準二級のライティング採点お願いします。できれば16点中何点かも教えてくださると幸いです。 問題：Do you think it is a good idea for people to learn how to cook by using the Internet... Read More

（5）を教えて欲しいです🙇‍♀️

□(5) あなたが昨日, 何の教科を勉強したのか私に教えてくれませんか。 (studied / you/subject/ tell / what/will / me / you) yesterday? Tell me what 次の対話文を読んで問いに答えなさい。 Nana: We will have a chorus contest at the city hall next month. Our club is going to sing three songs. have any good ideas, Meg?

【高二論理表現】この問題を教えてください🙏お願いします！

1( )に語を入れて次の文を完成しましょう。 1. People ( ) live in this area eat a special kind of seafood. 2. Kabuki is a traditional Japanese musical performance ( makeup and dress in special costumes. 3. There is no agreement about the reason ( 4. You may experience ( abroad. ) people wear ) the Moai statues were built. ) is not written in a guidebook when you travel

下線部Dと答え.ウはなぜ同じ用法なんでしょうか 教えてください🙏

closer to reality. Researchers have investigated the use of electricity to stimulate vision for nearly half a century. In the 1960's, a *physiologist implanted 80 electrodes on the surface of a blind person's *visual cortex, a region at the back of the brain. Wireless stimulation of the electrodes made the patient see spots of light known as *phosphenes. This is the first stop for visual signals coming from the eye. (D) By the 1980's, a crop of *ophthalmologists began considering a narrower and seemingly easier-to-solve problem: making *prostheses for the eye. They suggested that degrade *photoreceptor cells called *rods and cones, still leave large portions of the retina intact even after a patient has become totally blind. The way to stimulate the remaining functional cells was proved *feasible in the mid-1990's. A device consisting of a tiny video camera perched on the bridge of a pair of glasses, a belt-worn video processing unit, and an electronic box, was developed recently. The electronic box issues signals to an implant behind the patient's ear that has wires running to a grid of 16 electrodes affixed to the output layer of the retina. The video processor wirelessly transmits a simplified picture of what the camera images to the box, and then the retinal implant stimulates cells in a pattern roughly reflecting that information.

写真の答えが書いてあるところはあっているかと書いてないところの答えを教えてください🥲🙏🏻

1 : had +£/££?£: had been V-ing 過去のある時点を基準に、それよりさらに過去の出来事について述べるために使われる 「(その時) すでに~していた」 「(その時まで) ずっと~していた」) さらなる過去 過去のある時点 現在 1 This village had lasted for 1,000 years before it disappeared. (p.62) 2 Yamaoka Nobutaka had spent five years visiting 100 Jomon sites before filming a movie. (p.66) 3 When my first flight arrived in Jakarta, my next flight had already left. 4 Before that, they had been moving from one place to another. (p.62) 5 We had been talking for an hour when my mother came in. Exercises 1 Complete the sentences using the words in parentheses. e.g. I went to Sam's house, but he wasn't at home. (he, go, out) He had gone out before I arrived. 1. A woman talked to me on the street. I knew her face. (I, meet, her) I thought I had meet her somewhere before. 2. It was really nice to see him again. (I, not, see, him) 実際の In fact, I had ところは、 not seen him for three years. 3. Katy was so happy with the Japanese doll you gave her yesterday. (look for) She had been looking for it for many years. 2 With your partner, make up conversations with your own ideas. "B" uses "had done" or "had been doing," and "A" responds with comments or questions. 1. A: Did you enjoy the movie with your sister? B: Not really. Before we arrived at the theater, A: 2. A: Hey, you looked very tired when we met last Friday. What was wrong? B: I was so busy last week. I A:

5番の文章でbutの前にコンマがつかない理由を教えて欲しいです🙇🏻‍♀️butの後ろが完全文だとコンマがつくと思っていてほかの文もそうだったのですが5番だけ違くてよく分からないです。

√ 3 4 5 6 7 8 9 ☐ I am meeting Tom at 3 p.m. at the station. My father drives a bus. Today he has the day off, and he is at home. Our end-of-term exams begin in three days. Harry usually wears glasses but he is wearing contact lenses today. I used to hate tomato juice, but now I love it Emma is always complaining about the food in the cafeteria. ☐ If you are overweight, you are not exercising enough. ☐ We use many tools in our daily lives without being aware of it. 0 ☐ Today(,) I received [got] an email [e-mail] from a friend saying (that) he to come / was coming] to see me on Sunday. 1 I have not decided yet [not yet decided], but I am thinking of [about] g work) by bicycle [by bike], but now [nowadays

Most of からの文の構造がよくわかりません

pick your favorite toothpaste or brand of beer, soup, or cigarette from others on the market? ビール たばこ Most of us like to think that our decisions to buy a particular product, to vote for a certain politician, or our opinions about war and sex and minority groups, are rational decisions. ( D ), we tell ourselves that we make up our minds about things only after we have given the situation considerable thought. However, while we often do think through such matters logically, there is much evidence suggesting that our viewpints are sometimes created