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数学 高校生

色がついてるところでどうやって式を変形したのか教えて欲しいです🙇‍♀️

File/d/12mvlw0u0gkTn17gOn-woNVLFWD59Z15E/view x+y-zx+y-3=0 すなわち (1)+(y+1/22(2) よって、求める円の中心は点 (1, -1/2) 半径は12/2 ある。 (p.106) 深める 方程式 ③は,円x²+y2-50 (中心が原点, 半径が V50円)を表すことができない。 円と直線が異なる2点で交わるための必要十分条件は D0 であるから m²-15>0 52 この不等式を解いて m<-√15,√15<m 円と直線が接するための必要十分条件はD=0 である から m²-15-0 この方程式を解いて m= ± √15 m=√15 のとき, 2次方程式 ③ の解は 4m x= 4./15 (√15)²+1 このときy=√15.15-3 5. √15-3-2/ 3= x= ✓15 m=-√15のとき, 2次方程式 ③の解は 4m 4.(-√15) m² +1 (-√15)²+1 √15 1110 問題10 連立方程式 ② を①に代入して整理すると (m²+1)x²-8mx + 15 = 0 ③ この2次方程式の判別式をDとすると =16m²-(m²+1)-15 m²-15 VTTWTY TE (x² + y²-2y=0 ...... ① ly=mx-3 ①③から 12 x1=1= すなわち これは点 (a,b), 点 (c, d) が直線x+2y=5上にあ ることを示している。 したがって 求める直線の方程式は x+2y=5 問題12 接点の座標を(x1+ y1) とすると x₁²+y₁²=9 接線の方程式は ① xx+yiy=9 **** (2) (1) ② が直線 4x+3y = 1 に平行であるための必要十分 条件は 4y1-3x1=0..... ③ 9 12 または x₁== 5 よって, 求める接線の方程式は,②から 1/23x+2/23y=9 または 12 9 5 4x+3y=15, 4x+3y = -15 ****** において, U Y1 = :9 95

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英語 高校生

英検一級のライティングの添削をお願いしたいです。 Should the Japanese government encourage more immigration? というトピックで書きました。よろしくお願いします。

The Japanese government should encourage more immigration Problems such as lack of diversity, Japanese companies retreating from the world declining birth rate 39 there is a because market, and aging population with a can be solved by increasing immigration. Japan, although it is one of the advanced countries, lack of diversity. Except of big cities like Tokyo, there are only few foreigners. I think this is a set back to Japan while other countries are stepping foward by changing its own system, Japan is refusing to make a change to its old style, and I believe this is because Japan doesn't have abundant. perspectives. foreign countries to. By encouraging more immigration, they can provide many different views and stimulate Jahanese people. as of what does other countries. a image Japanese companies are retreating from the world market. Many Companies in Japan are producing overeng ineered expensive products that only targets Japanese customers and it is losing its power in other countries : If Japan accepts more immigrants Japanese companies. will be able to get detailed regire to their product and stay in the world market. Aging population and a declining birth rate is a huge problem in Japan right now. Because of it, companies are losing workers and young people will have to saffer with a lot of taxes in the future. Encouraging immigration can increase population and solve. these problems more By encouraging more immigrations, many problems that Japan is facing can be solved.

解決済み 回答数: 1
英語 高校生

一枚目 長文 二枚目 問題(ア) 三枚目 自分の答えand模範解答 付属の解説本が意味不明でした。解説お願いしたいです。

10 Life Reading 目標 20分 速読問題 次の英文を2.5分で読んで, 1. の問いに答えなさい。 Would you like to try to read a book that is 140 pages long every day! Many - are Japanese are surprised (2) to learn how long some American newspapers are. They a Slæom orll aneqsgewen to ancieev listipib ert asli orl not always 140 pages long, but they are usually at least 50 pages long. On Sundays 70198 ni olqooq odT C to 21697 0 1 qoq T some big city newspapers have hundreds of pages and *weigh almost a kilogram. gnibro biqs news, too. 37 There are lots of sections 5 (3) Of course, not everything in such a newspaper is news. m2 T raqaq zabavě s esi vis (1974-monib) 19m 16918 i 1996 about books, movies, travel, computers and hobbies, as well as star interviews and es, as well s boy arroqe bas zadintend comics in color. There are also many *advertisements, of course, but a lot of people ano ang m CECING OF COU vsbru² no,199sq ylisb niebimos atidhe bias Hold com bris flood, 25ñola bas find the advertisements very entertaining. Of course, the newspapers have a lot of he) {lind sdt ni snovievs ch the news Moky) zpililoq You may be surprised to find that (4)such large newspapers are (5)very cheap. They gaidyar are much cheaper than a newspaper in Japan. A large, heavy Sunday *edition of a vbodyas J Sunday edition of a Japanese newspaper. ding/ 4 weigh [wéi] : 重さが・・・である 11 edition [idífan] : (新聞の)… 版 1. smi ca ad te bear a newspaper in a big city may only cost about 350 yen, but it is 20 times bigger than the JR noilo92 smse sdt best a siqot amae ad juos at ziqot installib yasm tuds et 7 advertisement [ædvərtáizmənt]: 2 @ (171 words)

解決済み 回答数: 2
英語 高校生

一枚目 長文  二枚目 選択肢 三枚目 自分の答えand模範解答 解説お願いします。

10 Life 目標 20分 Reading 速読問題 次の英文を2.5分で読んで, 1. の問いに答えなさい。 Would you like to try to read a book that is 140 pages long every day? Many Chod of gi amor gnivel 91018 Japanese are surprised (2)to learn how long some American newspapers are. They are Strom erll aneqaqawen to anoienev Istigibrarü alilorlW not always 140 pages long, but they are usually at least 50 pages long. On Sundays, 208 miss ni olq to a los d some big city newspapers have hundreds of pages and *weigh almost a kilogram. gnibro biq 5 (3) Of course, not everything in such a newspaper is news. al nogeq vebau2 s dva no news, too. about books, movies, travel, computers and hobbies, as well as star interviews and kl zweiver sivom bruslood 2911212919i nemud" brit a day toge bns eesnied . F comics in color.euThere are also many *advertisements, of course, but a lot of people ni immortwebas dold bris,noisse blow a e'eredi ysbru² no 199sq ylisb find the advertisements very entertaining. Of course, the newspapers have a lot of rimantledi ni mot There are lots of sections 12 sdt : [xbiszid] anbied we ca de terroiri nemar You may be surprised to find that (4)such large newspapers are (5)very cheap. They Sunday edition of a Japanese newspaper. news gnidrens S vbodzub are much cheaper than a newspaper in Japan. A large, heavy Sunday *edition of a gnition 4 weigh [wéi] : 重さが・・・である 11 edition [idifan] : (新聞の) ・・・版 1. こ 7 advertisement [ædvərtáizmənt]: but it is 20 times bigger than the newspaper in a big city may only cost about 350 yen, but it is zamit Jn979llib Jis moitos sme si bes ne E DAS C plot me juos ziqot installib yasm Juods xls) 62 . a b 2. (171 words) (

解決済み 回答数: 1