例題について質問です。 y=x^2-2xを折り返してできるグラフが直線y=-x+2よりもyが大きくなる切り替えの点はどこから求めているのでしょうか？？

本 例題 167 x軸の周りの回転体の体積(2) 00000 放物線 y=x2-2x と直線 y=-x+2 で囲まれた部分をx軸の周りに1回 転してできる立体の体積Vを求めよ。 CHART & SOLUTION 回転体の体積 回転体では図形を回転軸の一方に集結 をかくと〔図1〕のようになる。 ここで, 放物線 まず, 放物線 y=x²-2x と直線 y=-x+2 と直線で囲まれた部分はx軸をまたいでおり, これをx軸の周りに1回転してできる立体は, [2]の赤色または青色の部分をx軸の周り に1回転してできる立体と同じものになる。 基本例題166 と異なり、この場合はx軸の下側 (または上側)の部分をx軸に関して対称に折 り返した図形を合わせて考える必要があることに注意! 解答 x2x=-x+2 とすると, x2-x-2=0 から 基本166 2 2 ON 1+y== x²+2x\ 〔図1] [図2] x=-1,2 放物線y=x²-2xのx軸より下側の部分を, x軸に関して対 称に折り返すと右の図のようになり、題意の回転体の体積は, 図の赤い部分をx軸の周りに1回転すると得られる。このと き 折り返してできる放物線y=-x2+2x と直線 y=-x+2 の交点のx座標は,-x2+2x=-x+2 を解いて x=1, 2 V=z_{(-x+2)-(x-2x)}dx+πf(x+2)dx +(-x²+2x)²dx =(x+4x-3x2-4x+4)dx+πf'(x-2)dx +(x-4x+4x)dx =* - * 3² + x^-x³-2x²+4x] + [(*=-2)²]" 5 YA 265 6章 -10、 1 19 体 ←次の3つの図形に分け て体積を計算する。 積 4 -x4+ 19 7 8 π+ 5 π+ 3 RACTICE 1673 100 20 3π 15-15 π=- 不等式 -sinxsyscos2x, xで定められる領域をx軸の周りに1回転して できる立体の体積Vを求めよ。 [類 神戸大 ]

過去問です この紫のマーカーの意味と一文の訳を教えて欲しいです！

INT: It's an active vs. a passive engagement issue? (D) Kang: Absolutely. There's also a new area of memory research that looks S vð at our ability to remember things if we know the information is (E) stored externally, for example, on a computer. The idea here is that our "working memory"-what we're focusing on at any given has a limited capacity. If we exceed that capacity by. example moment

数3です 233の(1)教えてください🙇‍♀️

S1 (5) Jos1 232 次の定積分を求めよ。 ☑ *(1) Solcosx|dx ②S2 *233 次の定積分を求めよ。 B 問 題 (2) 12x+cos3x)dx =1-12c052x+ / sin3x 1 =(1/2-1/3)-(-1/2)=13/0 x So sinox cos // dx =1200 (sin3.x + sin2x)dx =/1/21-1/cos3x-1/2 cos 2x (1) Solcos 201d0 (2) 2 22 3 CONNECT 21 定積分の最大 (3) costcos3tdt I 定積分I=2 (a-cosx) dx を最小にする実数 =22 (cos4t+cos2t)dt 0 考え方 問題 231 + 2次関数の最大・最小 まず定積分を計算して, I をαの関数とし I=(2-2acosx+cos2x)dx= (a²-2a cosx+cos³x) dx=√² (a² 0 =|ax-2asinx+2x+1/sin2x] = = 212 T 2 π + π 4 (4) sin 4t += sin 2t = 3√3 8 √√3 √3 * cos³ xdx=1+

この緑のマーカーで引いているのってどういう意味ですか？

the route INT: It's an active ys a passive engagement issue? sue Kang: Absolutely. There's also a new area of memory research that looks - at our ability to remember things if we know the information is (E) stored externally, for example, on a computer. The idea here is that our "working memory"-what we're focusing on at any given moment has a limited capacity. If we exceed that capacity by, say, paying attention to five things at once, we might try to unload some of that remembering to external storage. And if we begin to have an expectation that the information is always at our fingertips, we might not keep the information in our mind very carefully when we do encounter it.

605の答えは2になるのですが、それだと受け身になってしまいませんか？だから過去完了でhadかなと思ったのですが、なぜ2になるんでしょうか？

KEY POINT 605 Three fifths of the work ( ) finished. 1 had was 3 were would were A18 (oels) tud A vino Jon 606 on the bench. baad bna yalq od doll Ta on-00 <東北薬科大) Most of the people was gathering around the little girl sleeping ① becundt flow analys ③ <早稲田大) TEXTUA Jallad 1- 605 分数+ 単数扱い quirkypoid ensol 606 分数 + of A が主語 「分数+ of A」が主語の場合,動詞はAに一致させる。 ○ 本間は, the したがって、 work に着目し、 ② was を選ぶ。 was. する。 re most of A が主語- 複数扱い

20番の問題で僕は3番のmay had goneを選んだのですが答えは2番のmay have goneでした。これは過去完了の推測だったって認識で合ってますか？詳しく教えて頂けるとありがたいです

eat e d re those days and, towards this end, (17) Columbus went on a great slave raid in the Americas in 1495. It is believed that Columbus took up to fifteen hundred native American people to become slaves. Men, women, and children were gathered up and sent to cages where Columbus picked five hundred of the healthiest ones to send back to Spain. During the trip back to Spain, two hundred of the captives died en route*. The ones who made it to Spain were sold into slavery by the church. (18) So, now we know that Christopher Columbus was not a brave pioneer who went to a new world () discovery and fame, but a person who was looking to make himself rich. He ( ) to the Americas looking for gold. [(19)[] (20 but he found a people who he sold into slavery for his own profit. Not quite the hero the history books made him out to be, wouldn't you say? (注)en route 途中で 下線部(1)"all across” の意味に最も近いものは次のどれか。 解答番号は

なぜgrowにthがついているのですか？

5 new technologies and *cooperation between important. Let's share three stories to learn the fact. In 2016, *Portugal tried a test for energy. They used only renewable energy such as wind, water, and sunlight. They could produce all the electricity that was necessary for the whole nation. Now, the government and companies are ( D ) together to make some new *power plants. They want to use more renewable energy because the energy can save oil 10 and protect the environment. The people think using renewable energy ② ]. Their goal is to stop pollution, have more energy, and get *economic growth. is In *Hungary, a small company is trying a different plan for producing electricity. Instead of building big power plants, they are thinking about something much smaller. The company is designing *solar panels made

この問題の添削をお願いします🙇‍♀️🙇‍♀️

2 次の日本文の下線部を英語に訳しなさい。 異文化のなかにぽつんと出ていったとき, かたくなに自分の基準を守ろうとする人と,なん とか郷に従おうとする人がいる。 私は後者である。 自分の基準を守るのならば、これもまた, 旅に出る必要がないではないか, と思っているようなところがある。 (角田光代 「お金と沈黙」 『春秋』 2007年6月号) (H20 東北大・前・改)

なんで③になるか分からないです。 調べたこと書き込んであるのでその上で解説をお願いしたいです🙏🏻

3 ④ the other The company's latest tablet computer has outsold ( competition.j ① which 競 (2) what 今相手 those whose コンテスト より99売れる ) of the →競合他者を 上回った

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.