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数学 高校生

この6という数字はどういう手順で出てきたのですか?教えてください🙇‍♀️

E (2.1) (1,1) ) D(2,0) C(2,0) ある。) D(1,2) C(1, 1) (0) A(1,0) 53 ベクトルと軌跡 (2) ・・・ 直線 問題 49 平面上に∠ABCがあり, 点Pが次の等式を満たしている。 PA+2PB+3PC=kAB 654 Ikが実数全体を動くとき, 点Pの軌跡を求めよ。 (01) (2) 点PがABCの内部にあるようなんの値の範囲を求めよ。 似たような問題を例題26で学習した。 本問では, 等式に変数kを含むから、その値によっ 止めた て点Pの位置が動く。 (1) 計算がらくになるように,点Aに関する位置ベクトルで考える。 そして, AP を AB, AC で表す。 HOT (2) 点PがABCの内部にある )-201 ⇔AP=sAB+tAC, s> 0,t> 0, s+t<1 (1) 等式から -AP+2(AB-AP) VIE +3(AC-AP)=kAB 09 よって AP= (2-k) AB+3AC Heral ゆえに B AP= 1/1AC+2-1AB..... ① 6 ② から 2-k 6 -は実数全体を動くから, 求める点Pの軌跡は 2-k 6 k<2 P 辺ACの中点 D を通り, 辺ABに平行な直線 (2) 点PがABCの内部にあるための条件は, ① から 2-k 1 ②, ·+ 2 46. 80s ->0 E ③ から 2-k+3<6 したがって、求めるkの値の範囲は <1. AC 2- AB よって k>-1 -1<k< 2 AD C [ 岐阜大〕 ◆例題26.41 ベクトルの分割 EF-OF-OE #t: EF=-FE ■ベクトル方程式 patta の形。 は実数全体を動く。 AD-AC 注意 ①から, 点Pは k=2のとき辺ACの 中点Dと一致し, k=-1のとき辺BC の中点Eと一致するこ とがわかる。 503 1章 6 ベクトル方程式

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英語 高校生

関西学院大学の英語の問題です。 定期テストの初見問題で出た問題なのですがBの(2)の線で引いた問題(空欄補充・画像1枚目の13行目の真ん中辺りにあるgeneration (2) generationの問題です。)の答えがなぜ(エ)afterなのかが分かりません。 どなたか教... 続きを読む

次の英文を読み、 下記の設問 (A~D) に答えなさい。 In the last few decades, people all over the world have been told that humankind is on the path to equality, and that globalization and new technologies will help us get there sooner) In reality, the twenty- first century might create the most unequal societies in history. Though globalization and the Internet bridge the gap between countries, they threaten to enlarge the gap between classes, and just as humankind seems about to achieve global unification, the species itself might divide into different biological types. Inequality goes back to the Stone Age. Thirty thousand years ago, hunter-gatherer tribes buried some members in grand graves filled with thousands of ivory beads, bracelets, jewels and art objects, while other members had to (7)settle for a mere hole in the ground. ( 1), ancient hunter-gatherer tribes were still more egalitarian* than any succeeding human society, because they had very little property. Property is a condition for long-term inequality. Following the Agricultural Revolution, property multiplied, and with it inequality. As humans gained ownership of land, animals, plants and tools, hierarchical** societies emerged, in which small elites monopolized wealth and power for generation (2) generation. Hierarchy, then, came to be recognized not just as the model, but also as the ideal. How can there be order without a clear hierarchy between elites and ordinary people, between men and women, or between parents and children? Authorities all over the world patiently explained that just as in the human body not all parts are equal, so also in human society equality will bring nothing (3) disorder. In the late modern era, however, equality became an ideal in almost all human societies. It was mainly due to the Industrial Revolution, which made the masses more important than ever before. Industrial economies relied on masses of common workers, (4) industrial armies relied on masses of common soldiers. Governments invested heavily in the health, education and welfare of the masses, because they needed millions of healthy workers to operate the production lines and millions of loyal soldiers to fight in the wars. with ti own no (3) of sup horizo partic again A. Consequently, the history of the twentieth century revolved around the ( 5 ) of inequality between classes, races and genders. Though the world of the year 2000 still had its share of hierarchies, it was かなり nevertheless a much more equal place than the world of 1900. In the first years of the twenty-first century people expected that the egalitarian process would continue and even speed up. In particular, they hoped that globalization would spread economic growth throughout the world, and that as a result people in India and Egypt would come to enjoy the same opportunities and privileges as people in Finland and Canada. An entire generation grew up on this hope. Now it seems that this hope might not be fulfilled. Globalization has certainly profited large portions of humanity, but there are signs of growing inequality both between and within societies. Some groups increasingly monopolize the fruits of globalization, while billions are left behind. Already today, the richest hundred people together own more than the poorest four billion. This could get (6) worse. The rise of Al (Artificial Intelligence) might eliminate the economic value and political power of most humans. At the same time, improvements in biotechnology might make it possible to translate economic inequality into biological inequality. Soon the super rich might be able to buy life itself. If new treatments for extending life and for upgrading physical and intellectual abilities prove to be expensive, a huge biological gap might open up between the rich and the poor. By 2100, the rich might be more talented, more creative and more intelligent than the less advantaged. Once a real gap in ability opens between the rich and the poor, it will become almost impossible to close it. If the rich use their superior abilities to enrich themselves further, and if more money can buy them more efficient bodies and brains, B B V

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英語 中学生

問1の①ってどうしてtoじゃダメなんですか?

10 【読解問題】 英文を読んで問いに答えなさい。 Ocean. In 1997, an ocean researcher reached a new “land" when he was sailing across the Pacific However, it was actually a huge amount of garbage (float) in the ocean. land was made of big and tiny plastic pieces. It is now ② (call) the Great Pacific Garbage Patch. The In fact, there are five patches the world. ③ (in the Pacific/which / the largest / the researcher / of all / the patch/found/is). 研究者が太平洋で見つけたごみベルトは全ての中で最も大きいです。 The garbage patches are harmful to sea animals. They often get caught in fishing nets on the surface and cannot escape. They also eat small plastic pieces by mistake because these pieces look like their food. The plastics that human throw away kill many sea animals every year. It is said that the Great Pacific Garbage Patch contains about 80,000 tons of garbage. Some researchers say that there will ④ (is) more garbage than fish by 2050. We should reduce our use of plastic and gather the garbage in the sea. 問1 下線部 ①②④を正しい形に書き換えなさい。 問2 下線部③を正しい語順に並び替えなさい。 問3 次の質問に英語で答えなさい。 ただし ( )内の条件に従うこと。聞け Why do sea animals eat small plastic pieces by mistake? (7語以内の英語で) 問4 本文の内容と合っていればOを,違っていれば×を書きなさい。 (ア) An ocean researcher started to live on a new “land” in 1997. (イ) The five patches are nice places to live for sea animals. (ウ) Every year, many sea animals are killed by plastics humans throw away. 11 【英作文】指示に従って英文を書きなさい。 問 次の質問にあなた自身の立場で英語で答えなさい。 ただし、 質問への答えと理由を含めて15語以上 の英語で書くこと。 What is the most important to you? 2 次のようなときどのように言うか、英語で書きなさい。 ただし、( )内の単語を用いること (1) 「彼は日本で有名な歌手だ」と伝えるとき。 (a singer / who ) (2) 「これは私が一番好きな食べ物だ」 と伝えるとき。 (the food / which )

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