(3)の別解 円の中心がBCの垂直二等分線上にあって(2,p)と置けるいうことはどうして分かるのでしょうか？

(2)2点(3, 2), (5, -8) を直径の両端とする円 円の方程式を求めるときは,与えられた条件によって次のとちら。 基礎間 の間 チ] いね。 39 円の方程式 次の円の方程式を求めよ。 点(2, 1)を中心とし, 点(1, 4)を通る円 D-3 よりb=-6 これとのよりc=8 る 3点(0, 4), (3, 1), (1, 1)を通る円 よって,求める円の方程式は *+y-4.x-6y+8=0 D(2,p) を図い (別解)(右図をよく見ると………) R 1 側に とおくと,中心は線分 BC の垂直二等分線上に あるので,中心は D(2, p) とおけて, 半径をr とすると AD=r, CD=r だから, [2°+(カー4)?=?円 1 (1-2)+(1-)=r の-2 より,=3 よって,求める円の方程式は (ェ-2)?+(y-3)?=5 精講 の設定でスタートします。 I. 中心(a, b) や, 半径rがわかるとき 0 1 2 3 にな (ェ-a)°+(y-b)?=r2 II. 中心も, 半径もわかりそうにないとき r°+y°+ax+by+=0 が-8p+20=r? …① がー2カ+2=r2 のを : =5 は 解答 (1) 求める円の半径は (2-1)+(1-4)=/10 よって, 求める円の方程式は (ェ-2)+(y-1)=10 (2) 中心は, (3, 2), (5, -8) を結ぶ線分の中点だから 注(3)のように, 見かけは中心, 半径がわからないように見えても, 図 をかくと様々な性質が見えることがありますから, 図をかく習慣をつ けておくことが大切です。 2点間の距離 ● ポイント ; 円の方程式を求めるとき, 状況をみて, 次の2つのど また,半径は (4-3)+ (-3-2)%326 よって,求める円の方程式は ちらかでスタートをきる I.(r-a)+(yー6)3 II. °+y°+ar+by+c=0 (r-4+(y+3)°=26 (3) 求める円を+y+ax+by+c=0 とおく. 3点(0, 4), (3, 1), (1, 1) を代入して (中心も半径もわかり (3)において, 3点を通る円が存在しているのは,3点で三角形た きているからで,この三角形の外接円として求める円が定まり (演習問題 39 (2) [46+c+16=0 そうにないので 参考 3a+b+c+10=0 ……② latb+c+2=0 2-3 より, a=-4 これと3より b+c-2=0 ……3' 演習問題 39 (1) A(5, 5), B(2, -4), C(-2, 2) を通る円の方程式を求 (2) A(5, 5), B(2, -4), D(a, b) を通る円がかけないよう bの関係式を求めよ。 第3章

数学の問題で、この表の式ってなんですか？見にくくてすいません

m/formatives/61607fcea040217670c11167 DeepL翻訳 Desmos |関数電卓 メモVWeb A ALEKS - Kaz ard (インターネット回線の 14 15 16 17 18 19 20 21 8 9 10 11 12 13 O- 910 f{x) ZOom in X 3 24 4 48 5 96 6 192 384 8 768 IZ 60 58 Zoom in 56 54 52 50 48 46 44 42 40

なぜwhoの前は人ではないのに関係詞whoがあるのですか？

whales and seals that make sounds like they are talking. There is even an elephant named Koshik who ( 28 ). Koshik, who lives in a zoo in South Korea, has started to say a few Korean words. At first, experts did not believe this story because of the shape

教えて欲しいです

1st Zone 2nd Zone Au07 DIS C 副詞の使い方 be p.583, 588 6 They talked loudly. 6 This is a very interesting book. 0 The hotel is just in front ofthe station. Joo1 odt ao ynigssla e 20.4.1 559 fnob IV too19 mo is sd 20.5.1 567 20.5.1 568 副詞を使って,「どのように〈様態〉」 「どこで〈場所〉」 「いつ〈時〉」 「どのくらいなのか(程度 頻度〉」 という情報 を加える。 6動詞を修飾する ⑥ 形容詞/副詞を修飾する ■(様態)を表す副詞: carefully, happily, quickly, quietly など「a p.583 動詞に続けるか, 動詞の前に入れるのが普通。 ■(場所〉(時)を表す副詞: here, there, abroad, today, tomorrow, tonight など「p.584t doinw odT Let's go upstairs. We went to the zoo yesterday. ■(程度·頻度〉を表す副詞: very, almost, nearly, usually, always, sometimes など p.585 I often visit my grandmother's. ① 句·節を修飾する om odd ni vhastog He quickly ran away. の容 押 日本語の意味に合うように, ( )に適切な語を入れなさい。 1. 彼は静かに部屋を出た。 イボ He left the room ( 9 bs\ obea vu aiYai) さ地木 2. 私は今夜,映画に行きたい。 Iwant to go to the movies ( 3. スコットはいつも, 朝に牛乳を飲む。 Scott( ) drinks milk in the morning.

数3の積分の単元です (4)の問題で、 回答だとsinx=cos(π/2-x)を使っているのですが cosx=sin(π/2+x)を使った場合は解けないのでしょうか？ また、cosx=sin(π/2+x)を使って解けないとしたら、それはどこから見極めればいいのでしょうか？

例題 7-21 中間期末 出題度 00 2次私大 9 試験出題度 次の問いに答えよ。 =* sin"zdzとする。 nが2以上の自然数のとき, n-1 オ-2が成り立つことを証 n 明せよ。 (2) 1,の値を求めよ。 (3) 1,の値を求めよ。 π 2 (4)1 sin":rdz = cos"zdzが成り立つことを証明せよ。 0

what can we learn from this dictionary?からの後半部分を英語で簡単にまとめて欲しいですm(_ _)m

Retelling Lesson3 A Window to Ancient Earth Part 3 ; Let's turn our attention to your discovery. Tell me how it all happened. T: All right.It was in 2009, my second visit to Antarctica, There are more than one hundred lakes around Syowa Station, Idove into one of them, Lake Naga-1ke. Asl went underwater, a fantastic world came into sight. A great number of green cones were extending from the bottom of the lake. They were made of various mosses.。 algae, and cyanobacteria. Nobody had expected such a green plant community to be spreading underwater, while a rusty rocky field stretched out on land. J: What can we learn from this discovery? T: Actually, most of the lakes around Syowa Station were exposed from under the glaciers about ten thousand years ago, when the last ice age ended. Over a long period of time, life gradually settled in the lake. But when I dove into Lake Naga-Ike, I didn't find any predators such as fish or zooplankton. Compared with Lake Naga-Ike. lakes on Livingston Island in the warmer area of the Antarctic Peninsula have predators like shrimps and z0oplankton.In short, the ecosystem without predators in Lake Naga-Ike is more primitive than that of the lakes with predators on Livingston Island.

上の文の冒頭のSlowlyはどういういみですか？

Slowly, however, zoologists had to reach agreement and admit that the creature was real and not a fake, however upsetting it might be to zoological notions. For one thing, there were increasingly reliable reports from people in Australia who caught glimpses of the creature alive. The paradoxus was dropped and the

訳と答えを教えてください。

2|英語表現上,誤りのある下線部を1か所選び、, 正しく書き改めなさい。 1. Although 。there is a slight chance of rain tomorrow, abut the children's trip to the zoo gwill go on gas scheduled. 愛知淑徳大 2. She became overy excited during the ice skating show that she abegged her mother gfor a pair of skates. 学習院大 L

こちらの①を並び替えてください、よろしくお願いします🙏🙏

関係代名詞1) 読解問題 自然 会話文を読んで, あとの各問いに答えなさい。 I went to the zoo yesterday. It was fun, but (to / felt / for / I / that / have / live / bad / the animals) in *cages. They are happy when they live in nature. I'm not sure about that. If animals live in a zoo, they have food to eat every day. I think animals are happier when they live in zoos. But when many people take their pictures every day, the animals must feel *stress. Animals aren't worried about things like that. A Nature is very dangerous, so it's much safer for animals to live in zoos. B People catch many animals living in nature to bring them to zoos. Some zoos are working to protect some kinds of animals. This helps to *prevent them from *going extinct. C They can't live in nature, *even if people try to return them. I'm also worried that dangerous animals may *escape from zoos. you dor The people who work at zoos watch the animals very *carefully, so need to worry about that. D *entrance fee, and if it's not enough, the zoo c But visitors to the zoo pay an The children who watch animals at z0os can learn *raise the entrance fee. importance of the lives of animals. Zoos are necessary for children, too. It's a very difficult problem. We need to keep thinking about many things.、 prevent from ..:~が…するのを防ぐ 7トレス 逃げる

ここの、African lions は、なぜ African’s lions にならないのでしょうか？

1 The Lincoln Park Zoo is in the heart of Chicago. You can easily 65.Chicago's Free Zoo の出(165 1 The Lincoln Park Zoo is in the heart of Chicago. You can easiv drive there or take the train. It's a small zoo, but they have wild animals from all over. So you can see African lions and other bio cats. Sadly, they don't have elephants anymore, but they do have 5arhinoceros mother and child. Here's the best part it doesn't cost anything! If you have time, also visit the Nature Museum. It's just across from the zoo's entrance. In touch with her friends by