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数学 高校生

高二、二項定理の利用です。 「2」番です。 線を引いたところが何をしているのかが分かりません。x4-2rからx2に持っていくにはどうしたら良いのでしょうか。 解説お願いします🤲🏻

基本例題 4 展開式の係数 (1) (二項定理の利用) 次の式の展開式における,[ ]内に指定されたものを求めよ。 (1)(2x+3) [ x の項の係数] (2)(x-2/2)[x2の項の係数] p.12 基本事項 CHART & SOLUTION 二項定理 (a+b)" の展開式の一般項はnCran-br 指定された頃だけを取り出して考える。 (1) 展開式の一般項はC, (2x2) 6-1.3' = 6Cr・26-1.3x12-2 12x6 となる を求める。 (2) 展開式の一般項は Crx+(2/2) '=, C.2x.. .4-r. = = x2 となる r を求める。 XC 解答 (1)(2x2+3) の展開式の一般項は Cr(2x2) 6-1.3' = 6Cr.26-1.37x12-2r x の項は r=3のときであるから, その係数は 6C3・23・3°=20×8×27=4320 (2)(x+2/24) の展開式の一般項は C₁x (2) Cr-zx- = =x2 から x4-r=x2xr -*₁ = = ① よってr=1 ゆえに,x2の項の係数は Pedal もつことがわかる。 お人好き MOTTUJ 200 nCh ¥20円+ px の形に変形 ←12-2r=6 から r=3 DK p.136 ① から x++0+1+0 ・+ 当店される入れてもよい。 通り 二項係数 C について =x 4C1・2′=4×2=8+ (1) + xr 1章 1 =x4-2r これから 4-2r=2とし STA$ 1-4-r=2+r ²5 r=1 INFORMATION (a+b)” の展開式は (a+b)(a+b)(a+b)….. (a+b) の ①~⑦から,それぞれ a, b (①~⑦から、それぞれ。 ① 3 のどちらかを取り, それらを掛け合わせたものの和である。 よって, α"-6" の項の係 数はn個の (a+b) から6を取り出す個を選ぶ場合の数, すなわち Cr である。 「α」 を取り出す個数に注目しても nCr = nCn-r から同じ結果になる。 ) (S) ++

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英語 高校生

なぜ答えがfllowedになるのか分かりません。fllowingでは間違いなのでしょうか。現在分詞と過去分詞の使い分けがよく分かりません。分かる方よろしくお願いします_(._.)_

問題解 13) 旅行者たちはカメラを首から下げて、 繁華街をぶらぶら歩いてい (with +0+) 6. 1) Is this (the way leading to the park)? 2) (I heard someone calling my name) outside. 3) When I entered his room, (I found him listening to mus 4) Please (have this letter sent by special delivery). 5) Repeat (the sentence with your books closed). 6) The boy came into the lodge, (followed by his dog). 7) (Talking of soccer, do you) have any favorite teams? 7. 1) I'd like to have this watch repaired [fixed]. 2) There were a lot of people waiting in a long line. 3) Weather permitting, we are going [will / can go] camping weather permitting . 4) Generally speaking, women live longer than men. 5) Judging from the letter, he seems to be angry [it seem angry]. 第10章 比 TRYI (p. 210) 1) warmer, warmest 3) wiser, wisest 4) smaller, smallest 6) higher, highest 7) sadder, saddest 9) nicer, nicest 10) easier, easiest 較 2) colder, coldest 5) bigger, bigges 8) richer, riches EXERCISES 1 (p. 213) 2) faster, fastest 3) safer, safest 1. 1) longer, longest 4) lazier, laziest 5) heavier, heaviest 6) thinner, thinn 7) more precious, most precious 8) earlier, earliest 9) more quickly, most quickly 11) more important, most important 10) more careful, most ca 2. 1) better 2) worst 3) worse 6) later later on 「後で,後ほど」 7) latter 8) further 「深入りする」 → 「さらに入って行く」 9) less 訳 リチャードはもっと (人の話を聞き、口数を減らす TRY (p.217) 1) as: 私の腕時計は彼のほど高価ではない. 4) older 5) latest

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英語 高校生

動名詞のところです 分からないので教えてください🙇🏻‍♀️

A 日本文の意味になるように( )に適語を入れなさい。 1. 私はほかの人に自分の新聞を貸すのは気にならない(嫌ではない)。 I don't ( ) ( 2. エリザベスは日本風に座ることに慣れていない。 Elizabeth isn't ( ) ( ) ( 3. 疲れているようですね。 少し休憩を取り (have) たい気がしませんか。 You look tired. Don't you feel ( ) ( 4. これは私が自分で描いた (paint) 絵である。 ) my (. This is the picture ( 5. あの水族館は訪れてみる価値があるよ。 The aquarium is ( ) ( Challenge! に入る適語 (句) を選びなさい。 1. skiing 3. I'll never forget ( 7. seeing B 各文の誤りを訂正しなさい。 1. We'll look forward to see you again. 2. Would you mind lend me your videotape recorder? 3. He stopped to smoke for the improvement of his health. 4. Please remember calling me back tonight. C各文の( 1. Naoto's father approved of ( to work toward becoming a professional cook. 7. him to stay 1. he staying . his staying 2. Everybody in my class prefers skating to ( 7. ski . have skied ) my newspaper to other people. 1. to see 4. You should finish ( 7. write ). ) in the Japanese style. 1. to write ) a short rest? ) in France for another year in order ). ) Mt. Aso for the first time. ). I. he to stay I. having skied of me to see I. for me to see ) your manuscripts in a day or two. . writing I. written

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英語 高校生

この文章の4行目にある、because they would harm whatever bacterial life forms might be present on the planet の文構造についてなのですが、might の前にあるはずの関係代名詞の主格whi... 続きを読む

次の文章を読んで、 問1~4に答えなさい。 The establishment of a colony on Mars has been a dream for decades. Inevitably some people have objected to the idea of colonizing Mars on both ideological and practical grounds. Some object to humans living on Mars because they would harm whatever bacterial life forms might be present on the planet. Others oppose Mars settlements because they disagree with the idea of using the Red Planet as a "backup" in case the Earth is destroyed. Those in favor of colonizing Mars, however, look to spread the human race beyond our single planet. The practical considerations of surviving long term on a world without a breathable atmosphere, no surface water, exposure to radiation, and extremes of heat and cold all have to be addressed first. Mars colonists could survive in domed cities, extracting and recycling resources from the Martian environment. However, a more interesting plan for the settlement of the Red Planet involves a process called terraforming, turning the dangerous environ- ment of Mars into something resembling Earth. Billions of years ago, Mars was more like Earth, with a thick atmosphere as well as oceans and rivers of surface water. The planet may well have had complex life forms. However, sometime in the distant past, Mars lost its (A ). When Mars found itself without the protection of that field, solar wind relentlessly stripped it of its atmosphere, quickly turning the planet into the frozen desert it currently is. While a number of schemes exist to restore Mars' atmosphere, creating a runaway greenhouse process that would raise its temperature, NASA and some academic researchers recently came up with a simple way to achieve the process naturally. The idea involves the creation of an electromagnetic shield between Mars and the Sun to protect the Red Planet from solar wind. Without the solar wind stripping it away, the atmosphere of Mars would gradually become thicker. Soon the temperature on the Martian surface would become high enough to release the trapped ( B ) at the poles, accelerating the (C). Water ice at the poles would melt, giving Mars back some measure of its oceans and rivers. All humans would have to do is introduce

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英語 中学生

問題:英文の内容に合うように、次の問いに3語以上の英語で答えなさい。 ①What did people bring from Canada to America? という問題で、 模範解答が「They brought some (gray) wolves.」で、 私の解答が... 続きを読む

Long ago, there were a lot of gray wolves in America, but ずっと昔アメリカにはたくさんのハイイロオオカミがいましたが, 1960年代 in the 1960s, there were only 300. Farmers killed them to には300頭しかいませんでした。 農業主たちは家畜を守るために protect their farm animals. ハイイロオオカミを殺しました。 Wolves were very important to keep *balance in the オオカミは環境のバランスを保つためにとても重要(な存在)でした。 5 environment. Without wolves, the number of *deer increased. オオカミがいないため, シカの数が増えました。 Deer ate a lot of plants, and forests were destroyed. シカはたくさんの植物を食べ, 森は破壊されました。 animals lost their habitat. Some 生息地 a を失った動物もいました。 People wanted gray wolves to return to America and put wolves on 人々はハイイロオオカミがアメリカに戻ることを望み, 1973年にオオカミを絶滅危惧種リス the endangered species list in 1973. They also brought some wolves トに載せました。 さらに, カナダからアメリカにオオカミを連 れてきました。 10 from Canada to America. Now, there are over 10,000 gray wolves in 現在, アメリカには1万頭以上のハイイロオオカミがいま America. Gray wolves have helped the natural environment come ハイイロオオカミは、自然の環境が戻る助けになっています。 back. [104 words]

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英語 高校生

ここだけ❔だったので教えてください🙇‍♀️🙇‍♀️😭

I finni <3> silt to nobieg odi mi sami lan 20 yw en nobing rid of omo of grine 10w7 1'abib ins) SAT One morning the Giant was lying awake in bed when he heard some lovely music. It was nabung end mi var li good of lloge s Teao bar i deflora really only a little linnet singing outside his window. matrica Tegio oft roda to nol bed "I believe the Spring has come at last," said Trobing sili ni zeng out moil to omes to woft fiflituned e nad w borsqged IndW (18 the Giant, and he jumped out of bed and looked out. utzon grigniz borcie il olos ni nobing di borsvoobris bomoold i nings bid bre nemblido odi zol yozilli ood lat s oni wang il What did he see? 1 S E He saw a most wonderful sight. In every tree that he could see there was a little child. The (ne qmo'e'inci adi bevol d trees were so glad to have the children back again that they had covered themselves with blossoms 2991 bre Rewal od bojom of new ad Comoonbib aane lodi bo w god 20111 and were waving (A)their arms gently above the children's heads. The birds were flying about and frot ogod tanto dello? odi bib talW SIE Todo ad mi sunaris A twittering with delight, and the flowers were looking up through the green grass and laughing. It 2007) ont to gnimozzold of T was a lovely scene, but in one corner it was still winter. It was the farthest corner of the garden, and in it was standing a little boy. He was so small that he could not reach up to the branches of AUTRICHEKESHO SOTH SEHEKAYET EIN ogbrit adi ni fistus (1) the tree, and he was wandering all round it, crying bitterly 10 The Giant's heart melted as he looked out. "How selfish I have been!" he said. di area hil olid on silt (S) 問

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