答えを教えて欲しいです

間2.A: Excuse me, is this the train to Toyohashi? ① No, this one goes directly to Toyohashi. 2 You should use the platform over there. ③ It depends on how fast you can run. ④ The bus will arrive at the shopping center. 問3. A: Who bought this old desk? 0. O Ithought you did.. 2 The payroll department wil. 3 He's known as the oldest employee. に ④ Steve likes the desk. 138 T2 . 間4. A: Can you pick me up at the station? へ B: ① Sure. Will you leave there now? 2 Sure. Will you tell me where Tomoko's house is? ③ Sure. Will you call me before you take the train? の ④ Sure. Will you tell me what time you come back?

数Ⅲ 2次曲線と曲線　 画像1枚目の⑴の問題の解説が画像2枚目なのですが、🟥で囲ってあるところの解説がよく分からなかったので教えていただきたいです。 判別式で言うとbに当てはまるのが18kではなく、9kということでしょうか…？(わかりにくくてすみません💦) よろしくお... 続きを読む

91 kは定数とする。次の曲線と直線の共有点の個数を調べよ。 (1) 楕円 4x+9y?=36, 直線y=x+k *(2) 双曲線x-2y=4, 直線x+y=k (3) 放物線y=-4x, 直線 y=2x+k

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23:11 7月7日(水) 全@ 65% A olt.toshin.com 【修JI 難度別ソステム央譜 文広編」 (7/9) 文法(下線部言い換え) 判定 B テストコード 問題ID 受験日 得点 受験回数 3004511201 274566 2021/07/07 3/10 3 ●正解の閲覧について 解答表示 第7問 下線部の語句と置き換えても,文の意味がほとんど変わらない語句 を下から1つ選べ。 (1) It is much colder today than yesterday. [1] very too 3 far の less There isn't any milk in the bottle. is no の is a little ③ is little の is some 3] 3 Don't be (3) You must not be nervous. [ Not be の Not being ④ Be not The plane left Tokyo at night, and arrived in Seattle in the morning. [ 4] 0 arrived arriving being arrived の to be arrived (5) I remember that I visited the town. [ 5 ] 0 visiting visited ③ have visited の to visit (6) Because it is a holiday, we don't have to go to school. [ 6 ] 3 For ① So 2 Since の Though (7) She should get up early. [ 7] の have to was able to ③ must to のhas to (8) There are almost no students in the classroom. [ 8 ] の little 0a few (9) Let's go to the movies together. [ 9 ] 0 Can't we 2 Will we (10) Would you mind if I smoked in this room?[ 10 ] 0 my smoking 2 I smoking 2 a little 3 few 3 May we OShall we の me to smoke の me smoke

日本語訳をお願いします。🥺

右:小西幸子さんが通った広島 左:広島県産業奨励館(現原爆ドーム For a long time, streetcars have been vital to the people of Hiroshima. Among many streetcars in service today, a few of them survived the atomic bombing of World War II. They : 四訂版 On ーム 政女学校の生徒たち ロ」 addit kille pair to e Th na Al n streetcar[stritká:r] vital[váital] service[ssnis] in service 運行中の are atomic[atámik] bombing[bámin] called “atomic-bombed streetcars.” bomb[bám] Until the war, streetcar drivers were male. However. a lot.. battlefield [baetlf:ld] men were sent to the battlefields, so the drivers were renlo replace[ripléis] with girls. One of them, Konishi Sachiko, was oniy fourteen operate[ápareit] when she started to learn how to operate a streetcar after her daily studies at school. Working as a driver was hard, but Sachiko and her classmates were proud of their work. 1 Why are some of Hiroshima's streetcars called "atomic-bombed streetcars"? Questions 2 How did Sachiko and her classmates feel about their work? 132

この丸してあるkと2k-1はどこから来たんですか？

(2) 数列2,7, 12, 17, は, 初項2, 公差5 280 の等差数列であるから, その第を項は - 2+(k-1)-5=5k-3 ゆえに a,=&5k-3) 項 よって,初項から第n項までの和は ST 2a=25k-3)= (5k?-3k) k=1 k=1 k=1 (4 よ =52ド-32 -5+12m+1)-3-}+1) k=1 k=1 IS+ 6 1 8TS -n(n+1){5(2n+1)-9} 6 275 =言n(n+1(10n-4) 6 C -n(12+1)(5n-2) (3) 数列 10, 7, 4, 1, は, 初項 10, 公差 -3の等差数列であるから, その第え項は 10+(k-1).(-3)=D-3k+13 2k-1%-3k+13) ゆえに ak よって, 初項から第n項までの和は 1 n 2a=2(2k-1(-3k+13) k=1 k=1 n =M (16k°+29k-13) 三 (2 k=1 n =-62+2924-1321 k=1 k=1 k=1

数学の質問です。写真あります。(青チャ2B,P162) 写真下部の「"参考" 交点をもたない2つの円の場合についての考察」と書いてある部分について質問です。(ページ上部の部分は読まなくても分かるかと思います…) まず、k＝−1 のときx＝9/2 というのが 一体何を表し... 続きを読む

162 2曲線の交点を通る曲線の方程式(2) まず,前ページの[1], [2] について考えてみたい。[1](ともに直線)の場合について 事項 p.127 で説明しているので, ここでは[2] (ともに円)の場合について、例題O の円 めよ。 円tyー2 -2kx のをもとに考えてみたい。 解答のの:k(x2+y?-5)+x°+y?+4x-4y-130をx, yについて整理すると 計>0) 円と直線のス 円と直線の交 (&+1)x+4x+(R+1)y°-4y-5k-130 4x-4y+4=0 すなわち xーy+1=0 Peo2点の座標を k=-1のとき これは、x, yの1次方程式で,直線を表す。 2 2) 「kの値に大 よって、をに kキー1のとき 4 x+ 4 +1*+y-+1ソー 5k+1 =0 k+1 k=1 変形すると(+)+(yー-)= 5+6k+9 2 2 3 5k°+6k+9=5(k+ 36 >0であるから,これは円を表す D kを定数として える。 (円x+y°=5 を除く)。 赤色または青色の曲身すs 各kの値に対する曲格。 また,直線や円以外でもが+g=0 の利用が有効な場合がある。 2つの放物線の交点を通る直線 f(x, y)=x°+y, g(x, y)=-x°+2x+y+2とすると f(x, y)=0 は y=-x°, g(x, y)=0は y=x°-2x-2 となり,ともに放物線を表す。 kを定数として,方程式 kf(x, y)+g(x, y)=0 つまり,k(x°+y)-x°+2x+y+2=0を考えると, k=1のとき 2x+2y+2=0 すなわち x+y+1=0 これは,2つの放物線f(x, y)=0, g(x, y)=0 の交点を通る直線の方程式を表す。 Oは、円と直終 固形を表す。 図形0が原点 よ=0, y=0を ゆえに g.j 0 fx,)=0 0に代入して 整理すると これは円を表 参考 交点をもたない2つの円の場合についての考察 f(x, y)=x°+y?_9, g(x, y)=x"+y?-2.x とすると, f(x, y)=0, g(x, y)=0は右の図のような2つの円を表す。 をを定数として,方程式 kf(x, y)+g(x, y)=0 を考えると, 人3 2 円の方程 九外 Fx,)=0 317 この等式が x+2y 1 0,0か 9 k=-1のときx=- Bが得られる。 ゆえに 2 しかし, 2つの円は交わらないから, Bは2つの円の交点を 予 通る直線ではない。 ここで,直線B は次のような意味をもつ。 f(x, y). g(x, y)に共通な数tを加えて(例えばt=-16) F(x, y)=f(x, y)+t, g'(x, y)=g(x, y)+t とすることで,交わる2円f(x, y)=0 … ©, g(x, y)=0 … D が得られる。ここで, /を定数として, 方程式RF(x, y) +g(x, y)=0を考え, ピ=-1とすると ーf(x, y)+g'(x, y)=-f(x, y)+g(x, y)=0 よって,B は2円 ©, ① の交点を通る直線の方程式を表す (右図参照)。 よって 0から fx, )=0 ゆえに、 5 Sd交 -3 -1 練習 105 キャ

Q５の答えをお願いします。

When Words Won't Work く 15 Communication. ally Some people are making full hey sentences and even telling stories with pictograms. m A famous Chinese artist wrote the following “sentence.” Can you read it? A(△). From Xu Bing's Book from the Ground. See page 10 for answer. 信局は Will pictograms eventually take the place of TE 20 Words? Will they be the language of the future? What do you think? Dream eventually [ivéntfualij Q-7 What are some people making with pictograms?

①〜④の動詞を適当な形にして、根拠を教えてください。 自分で解いてみたのですが、よく分かりません。

PARIS -- "Ekiben," or lunch boxes Dserve in train stations, have begun making their way into the stomachs of travelers in Paris, France, after the first ekiben shop in the country appeared in Lyon train station on March 1 The shop was launched by Nihon Restaurant Enterprise (NRE), which is contracted to sell ekiben by the JR East. のKnow in France by the name "bento"(the Japanese term for a boxed lunch), the meals have become popular in the country because they are healthy and economical. Because theFrench are not accustomed to ③eat rice together with side dishes, however, the meals have been put together with French tastes in mind such as the use of lighter-than-usual flavorings. Customers 4 see buying ekiben at the Lyon train station in Paris, France, on March 1, 2016. (Mainichi) NRE President Katsumi Asai said during the opening ceremony, "The culture of the ekiben is deeply rooted in Japanese food culture. It dates back 130 years in history. and now there are over 2,000 types of ekiben" He added, "We have kept up this tradition of ekiben. At the same time, we keep in mind the cuisine-related preferences of the French people." Mikhail Lannoy, the assistant master of the Lyon train station said that "it is beautiful to see colorful foods packed together in a single box."

この問題を解いてください！！

77 読解時間2分52秒 回 Track 13 Can someone's birthday or *blood type influence their character? Some people believe so. Among young people, for instance, *horoscopes are very popular. There are twelve *astrological signs in a year, and your birthday tells you what sign you are. Horoscopes are based on these signs. They are often used to tell Someone's character. If you are born on April 1, for example, you belong to the sign, ** Aries.” People who believe in horoscopes say that anyone born under the sign of Aries is brave but a little careless. In addition to astrological signs, some people believe that your blood type has a lot to do with your character. For instance, a person with blood type A is said to be serious, a person with blood type B is said to be curious, a person with blood type AB is said to be artistic, and a person with blood type O is said to be very outgoing. In Japan, this blood type theory of character is very popular among people of all ages. Hundreds of books about blood types have been published, and some of them have become best sellers. Scientists say that there is no clear relation between astrological sign and character, or between blood type and character, yet many people are fond of asking others about their signs and blood types. It is true that not everyone believes in these theories, but for people who do, it can be a lot of fun to talk about and guess people's characters according to their blood type or sign. 258 words Jords & Phrases 1.1 blood type 血液型 1.6 Aries 名おひつじ座 1.2 horoscope 名星占い 1.3 astrological sign 星座

例題(2)です。 なぜ P k+1/Pk の式で始まるのか分かりません。

2 いろいろな試行と確率 401 Check 素製平響 GE 1個のさいころを13回続けて投げるとき, 6の目がk回出る確率を P。 とする。 このとき, 次の問いに答えよ,ただし, 0Sk<13 とする。 P Pa+1 をkの式で表せ Pが最大であるkの値を求めよ。 13回の試行で、6の目がん回出るとき, 6の目以外は え方(2) P。 と Pa+1 の大小関係(Pk>Pk+1, P< Pa+1)を調べる。 (13-)国出るから, P,=.C 1/ P&=13Ckl 「6の目が出ない」 は「6の目が出る」 | 13-k 9 の余事象 同様に,0SkS12 のとき。 Pe+1 は Pのkに k+1を代入すると よい。 1を+1/5\12-k +1=13C&+1 (I+4)-EIG/+\ +つ8 9 iET ダーZIG/+ ! Pe+1 P& 9 513-k i(4-EI) =(13-k)(12-k)! 13! I 19\i(4-1)i4 9 I 6(13-k) I k+1 9 9 4-ET T 13-k くル=のとき 9 ( (税) 9 13-k P=Pk+1 となるが, k, k+1が整数とな らないので不適 おおよそ下の図 Pk+1 P* 21 を解くと, ks -=1.33… より,k<1 のとき, >1つまり Paく Pa+1 Pa+1<1 のとき, (i)より, Pk k>1.33… より,k22 のとき,P&> Pt+1 (i), (i)より, k==0 のとき Po<P, k=1 のとき P<P2,|0123 k=D2 のとき P2> Ps, k=3 のとき Pa>P., となり, よって, k=2 のとき最大となる。 1213k 具体的に代入して書 き並べる。 Po<P、< Pa> P3>P4>…>P13 第 Focus ->1(大小比較は, 差をとるか比をとる) PR+l P P&+1>Pr→ >B を示すのに, A-B>0 を示す(差をとる)方法がよく用いられるが, 両辺が正 のときは, 比をとって1と比べる方法も便利である. 表の出る確率が LR 1) P。をkの式で表せ。 裏の出る確率がであるボタンを10個同時に投げるとき、 → p.412 |8) (2) P&が最大であるんの値を求めよ。 表がを個(0<k<10)出る確率を Ps とする. 次の問いに答えよ.