The Star ― one of America's oldest newspapers ― was established in 1852. Until the late 1950's, it was the most popular newspaper in Wash... 続きを読む

3.7<‪√‬14<3.8であるから‪√‬14≒3.7で計算しているのに対して、4.1<‪√‬17<4.2であるのになぜ‪√‬17≒4.2で計算しているんですか？‪√‬17≒4.1ではないかと疑問に思ってしまいます。 教えて欲しいです。

= 0.769230 (1) A2=(2+√14)²=18+4√14 =18+2√56 B2=(1+√17)²=18+2√17 √17 <√56 だから,A>B2 A>0,B0 だから, A>B (2)3.72=13.69, 3.82=14.44 だから 3.7° <14<3.82 ∴. 3.7 <√14 <3.8 4.12=16.81,4.22=17.64 だから 4.1<17<4.22 ∴ 4.1 <√17 <4.2 くりかえし. 2 よって, A=2+√14 > 2+3.7=5.7 位の数字は 6 また, B=1+√17<1+4.2=5.2 (8) ∴B<5.2< 5.7 <A -√2 ) 2 (3+√2) -62 7 よって, B<A 10 1 <√3 <2 より 65+√3<7 マダガスカ 首都:アンタニ

この問題の答えが合ってるか教えて欲しいです！

2 ( ( )内に下の[ ]内から適切なものを選んで補いなさい。 1. He gets angry when he loses a game. He's a poor ( loser ). 2. Suddenly, someone gave him a (push ) from behind. 3. The doctor will be here soon to have a ( look ) at your ankle. 4. He has decided to study law. I hope he has made the right ( choice ). [choice, look, loser, push]

英検準2級の英作文の添削をお願いしますm(_ _)m Do you think convenience stores should open twenty-four hours a day? Yes, I think so. I have two reasons. Fi... 続きを読む

(2)の問題で、黄色で引いているところが何をしているのかがよく分かりません。(2)の問題をできる限り分かりやすく解説して欲しいです。お願いしますm(_ _)m

重要 例題 19 (a+b+c³-3abc DEDED) (1) a³+b³=(a+b)³-3ab(a+b) b c a3+63+c3-3abc 数分解せよ。 (2)x3+3xy+y-1 を因数分解せよ。 x3+3xy+y³-1. REAGEE (1) a+b³=(a+b)³-3ab(a+b) . ① を用いて変形すると 解答 a+b+c3-3abc=(a+b)3-3ab(a+b)+c³-3abc=(a+b)³+c³-3ab{(a+b)+c} 次に,(a+b)+c について, 3乗の和の公式か等式①を適用し, 共通因数を見つける。 (2) (1) の結果を利用する。 (1) a+b+c³-3abc =(a³+b³)+c³-3abc =(a+b)3-3ab(a+b)+c³-3abc +6 をまず変形。 =(a+b)+c³-3ab{(a+b)+c} (*) ={(a+b)+c}{(a+b)²-(a+b)c+c2}-3ab(a+b+c) =(a+b+c)(a²+2ab+b²-ca-bc+c²-3ab) (a+b) とc のペア。 a+b+cが共通因数。 ()内を整理。 22の例

たすき掛けのところで、黄色で引いたところの意味がよく分かりません。もう少し簡単に説明して欲しいです。どなたかお願いします！

えば,x21 (x-1) と因 きるが, x 2 +1 は有理 では因数分解 なお、前の した式の展 なり,因数分 できるわけで 633 における因数の係数a, b, c, d を見つけるのに, 右のような図 式を用いるとよい。 このような計算方法をたすき掛けという。 dad ac bd ad+be 例 56, たすき掛けを利用して因数分解してみよう。 ① x2 の係数 6を2数の積 (a, cの組み合わせ) に分けると 6=1×6,2×3 2次の係数は, 正の数の組み合わせだけでよい。 定数を2数の積 (b, dの組み合わせ)に分けると -6=1x(-6), (-1)×6, 2x(-3), (-2)x3 ③これらの組み合わせの中からad+bc=-5を満たすものを見つける。 このとき, 2 -2 のように,横に並んだ2数が1以外の公約数をもつような場合を 3 考える必要はない。なぜなら, 例えば6x-6 を因数にもつならば,もとの式は6で全体をくくり 出せることになってしまうからである。 ?X 39 -2--4 6-65 よって, たすき掛けの組み合わせを次の4つに絞ることができる。 ←I _x -6--36 1 6X_636 2 -3-9 2 -1--1 3 2-> 4 3 6 -6 -35 6-6 35 6 -6 -5 この中でad+bc=-5を満たすのは、赤で示した組み合わせである。 しいかどう すること したがって ことがで a b c d 6x²-5x-6={2x+(-3)}(3x+2)=(2x-3)(3x+2) 参考 たすき掛けの意味 和服のそでをたくしあげるために両肩から両脇へ斜め十文字にかけてひもを結ぶことをたす き掛けという。用語 「たすき掛け」は,この和服のたすき掛けのひもの形からきている。

下線部④を省略されている語句を補って完全な分にしなさい。 という問題です！ 教えてください！Why notじゃだめなんですか？(´❛-❛`)

13 Reading Reading 104 /320 /100 /12 Recipe Listening 探検家のグレイはなぜ、高級ホテルに入れてもらえなかったのでしょうか? Richard Gray was a famous explorer". He was also a millionaire". He had visited every country in the world. Last year he decided to walk across Red Devil Valley, the hottest place on Earth. He walked for days over the hot desert sand. One night he found the place that he had camped in the day before. Gray had walked (). He was lost. Two days later he had drunk all his water. He couldn't walk. He crawled" to the top of a sand dune* and saw a man. The man was wearing clean trousers, a white shirt, and a tie. Gray crawled over to him. 4 "Water, water," he said. "I'm terribly sorry," replied the man, "but I haven't got any water with me." "Help me!" shouted Gray. "I'm a millionaire. I'll give you anything." That's very nice of you," said the man. "Look, I can't give you any water, but would you like to buy my tie?" NO 45 "A tie? Of course ()!" screamed Gray, and crawled away. He crawled slowly up the next sand dune. His lips were cracked and dry. When he reached the top of the dune, is he saw a huge luxury hotel. People were swimming in the huge swimming pool. There were beautiful fountains everywhere. "Is it a mirage*?" he thought. He stood up and staggered down the dune. A porter in a white uniform came out of the door. "Water. Please!" screamed Gray. "I'm sorry, you can't go into this hotel," said the porter. Why not? I've got plenty of money." "Yes," replied the porter, "but you aren't wearing a tie." NOTES explorer: millionaire: 大金持ち (268 words) Red Devil Valley: 架空の土地の名前 sand dune: R crack･･･にひびを入らせる luxury ぜいたくな crawlはう mirage: LAK stagger: よろよろ歩く porter (ホテルの) ボーイ パート ごとの 959

（③）に入る語を文脈から考えて書きなさい。という問題です 訳分からないので教えてください！！( Ꙭ )

*13 Reading Reading Gramma /12 Recipe Listening /324 /10 /100 探検家のグレイはなぜ、高級ホテルに入れてもらえなかったのでしょうか? *(Richard Gray was a famous explorer". He was also a millionaire". He had visited every country in the world. Last year he decided to walk across Red Devil Valley", the hottest place on Earth. He walked for days over the hot desert sand. One night he found the place that he had camped in the day before. Gray had walked ( ). He was lost. Two days later he had drunk all his water. He couldn't walk. He crawled" to the top of a sand dune* and saw a man. The man was wearing clean trousers, a white shirt, and a tic. Gray crawled over to him. "Water, water," he said. "I'm terribly sorry," replied the man, "but I haven't got any water with me." "Help me!" shouted Gray. "I'm a millionaire. I'll give you anything." That's very nice of you," said the man. "Look, I can't give you any water, but would you like to buy my tie?" "A tie? Of course ()!" screamed Gray, and crawled away. He crawled slowly up the next sand dune. His lips were cracked and dry. When he reached the top of the dune, is he saw a huge luxury hotel. People were swimming in the huge swimming pool. There were beautiful fountains everywhere. "Is it a mirage*?" he thought. He stood up and staggered down the dune. A porter" in a white uniform came out of the door. "Water. Please!" screamed Gray. "I'm sorry, you can't go into this hotel," said the porter. "Why not? I've got plenty of money." "Yes," replied the porter, "but you aren't wearing a tie." 20 (268 words) NOTES explorer: crawl: はう millionaire: 大金持ち Red Devil Valley: 架空の土地の名前 sand dune: E crack... にひびを入らせる luxury ぜいたくな stagger: よろよろ歩く porter: (ホテルの) ボーイ mirage しん気楼 パート ごとの 150

この3つが分かりません。教えてください🙇‍♀️

wal Rainforest trees are used to make things which we use every day. Rubber, for example, is used to make many things. The fruits of many forest trees ( 7 ) — forest people have eaten them for thousands of years. Today, all over the world, people eat rainforest food plants; for example, coffee, tea, oranges, and rice. Corn, which is an important food for many people of the world, is another rainforest plant. In 1970, a disease destroyed half the corn in the United States of America. Scientists began to look for new species in the rainforests. In 1987, in the Mexican rainforest, they found a new species which is stronger than other species. But we nearly lost this new species, because people were already cutting down that part of the Mexican rainforest. Hollywood, Los Angele movie stud (1) knows how many useful plants are already lost because people have SHOULD destroyed many of the rainforests of the world. Directors, actors, and writ The trees of the rainforests help the Earth's air because their leaves use carbon dioxide and make oxygen, which we need to live. its high point in these year They are also important because they control some of the Earth's weather. Through they give out water vapor which makes heavy clouds. The clouds then move to other parts of the Earth and give rain. The clouds also protect the Earth their large leaves, from the sun. (ウ) 日 moved to like Today, the Earth is slowly getting hotter, and in some places changes in the weather are making life much more difficult. We need to learn more about the Earth's weather while we still have the rainforests. and see the golden

15行目からどうしても訳せません。 訳教えて欲しいです🙇よろしくお願いします。

What would you do if you wanted to learn about something? A traditional way is to go to your bookshelf, pick up a dictionary or encyclopedia, and start turning pages. Now, however, you can turn on your computer, connect it to the Internet and start its search program. You just type in some keywords, click "search," and soon you will 5 have what you are looking for. 2 3) It seems as if anything you want to know can be found on the Internet. The range of information you can find on the Net varies from *gossip, to news, to the most advanced technological findings. Furthermore, the information is always fresh. New information is constantly added, past files are re-written, and *news reports are broadcast as they come in. 5) 3 What is being lost, though, is the joy of discovery. In many ways an Internet search is like a package tour. On a package tour, you generally know where you are going and see only what the *tour organizer has selected. Similarly, what you find in the Internet search is controlled by the site's owner or is the result of a computer program. On the other hand, turning the pages of an encyclopedia, as you look up an *entry, is more like wandering through a forest. You may accidentally find something interesting in the entry just next to the one you have been looking for. This may *stir up a new interest, which will eventually lead you into a totally different topic. 248 words>