黄色い線のところをどうやって考えているのか教えてください🙇‍♀️

特講 二項定理 ·nCr の性質 >>例題 4~8, Play Back 1, 宝を 例題4 二項定理 頻出 1 章 (1)(3x+2y)° の展開式における x*y° および xyの係数を求めよ。 2 3a- a の展開式におけるaおよび の係数を求めよ。 3abc 定理の利用 (a+b)" の nの値が大きい-→ 二項定理を利用 (a+b)" = nCoa"+»Cia"-1b+»C2a"-?6°+ … *定理の導き方は p.15 まとめ参照。 +,C,a"-rb"+… +»Cn-1ab""ー1+,Cn6" 一般項 o Action》(a+6)" の展開式の一般項は, n C,a"-b" (0SrSn) とせよ (1)(3x+2y)° の展開式の一般項 ごある。 C, (3x)°- (2y)” =D &Cr3°-r2" 20-グyr (r= 0, 1, 2, …, 6) 係数 x*y?, xy° となるようなrの値は? 解(1)(3x+2y)°の展開式における一般項は 6C, (3x)-"(2y)=C,3°-r2"x°-"y x-ry" の係数は。C,3°-r2" (r= 0, 1, 2, 6C2342° = 4860 6C,3'2 = 576 6) x*y? の係数は, r=2 とおいて xy® の係数は,r=5 とおいて 文字の部分がx*y?となる のは x°-Ty"= x*y? とお くとr=2 のときである。 (3a--)の展開式における一般項は (別解)(4章「指数関数 対数関数」の学習後) a7- a7-r = α"-r-2r = a'7-3r ar aの係数については a'-3r = a より a° ar の2 (r= 0, 1, 2, , 7) a7-r aの係数について, =aとおくと a'-r = ar+1 7-3r =1 から r=2 ar 6) 1 の係数については 7-r=D2r+1 より r=2 1 =a3として C3°(-2)° = 20412 たが とおくと よって,aの係数は a"-r の係数について, ar 11 ,7-7 1 a0-r=a" Q"-3r =a°より ァ-3 a° 10 7-3r = -3から r= 10 10-r= 2r より アミ 3 (以降同様) これは,rが整数であることに反する。 SaDL よって,言の係数は0 1日係数は「なし」 と答え てはいけない。 練習 4 (4x-y)? の展開式における の係数を求めよ。 - 整式·分数式の計算

この問題のとき、had madeではなくmadeだけだとどう違うのですか？意味は同じになりますか？

(2) エリーはまるで自分で作ったかのように, その製品を理解していた。d bo Ellie understood the product ( had as )(Te ) she )( nadle)it herself. @U 9/Suc6

あってますか？

go abroad の開係は the season と mostyot, Summer is the season ( 4 ) most people go abroad. Owith whom ② which 基本) took ③ where ④ when fage yau when 1 met the day) for the first time . adlie uiniog stdiljath a jina hmodo 0 2wond isdh uodan TRY Ill never forget (I/you / the day / met / when) for the first time. Il nauer

写真の問題の解答を教えていただきたいです。 私は1枚目が①、2枚目が水素だと思ったのですが、ほとんど勘のようなものなのでその解答になる理由も教えていただけたらさらに嬉しいです！ よろしくお願いします💪

下の図のように、硫酸の中に 50 ポイント 金属板(A,B,C)を異なる2 種類ずつ入れて電池を作っ た。すると、金属板A,Bの組 み合わせでは、Aが溶け出 し、Bの表面には気泡が見ら れた。金属板A,Cの組み合わ せでは、Aが溶け出し、Cの表 面には気泡が見られた。金属 板B,Cの組み合わせでは、Bが 溶け出し、Cの表面には気泡 が見られた。金属板A、B、C の組み合わせとして正しいの はどれか。図中の①~6のう ちから1つ選びなさい。 B Hadle Hhd04 HadC4 0| Mg Mg Fe Ni Mg Nz Mg fe N. Fe Ni Mg Fe Mg Fe Fe N 6) Ni O く ミ

Unless our flight is delayed or canceled,we'll travel as scheduled. 飛行機が遅れたり欠航したりしない限り、私たちは予定通り旅行する。 As long as you don't miss the deadli... 続きを読む

30.31.32.34.36が分かりません。 解説お願いします。 因みに答えは順番に、 ②①③①④です。 よろしくお願いします。

D次の英文の空所に入る最も適切な語句を、それぞれ下の①~4から選びなさい。 first walked on the init uoy big TE Won li pniob m'l,aeY ① 29. Neil Armstrong was the man moon. O which 2 what ③ who Jnob 4 where hooe uode lopiot ylotelgmoo ( 30. You had difficult day yesterday, I think you should take it easy this morning. Seevitsley uoy fieiv uoy ob neflo walH ① such ② such a 3 so sni how svi 4) so much euord a'embn6ip le 1ennib is9 ew ysbauniT vev () 31. There any reason to close the school tomorrow. The typhoon could turn away. h 9l uoy o etsewa wen ym to niid uoy ob isiW.e 2 might be O may not be 3 maybe not 4 1g eloo may be Jon a'ti.oM ) 32. Thad some terrible dreams after watching that movie. It was wasn't it? meldoi o nb of pniriermoa ell uoy bluoW .OA 3 scary -gnivsri ei uo 19vetsriw,91u O scared 2 scaring 4 scare 33. He knew the way because he there before. olitw ol bei 1eteiq l S erurl ion ml.yeXo a'terT ① was walking walked 3 had walked Jellsw ym bnit of meea f'nsolp 4 has walked 34. It was exciting to see him the world record with his first of the day! id yiev am9ea l O break 2 to break ③ broken (qlert em i ④ broke 35. You'll be able to finish before the deadline,_Yeeb 0o word wond erta a9o0 SA 19n es | ① O haven't you 2 don't you ③ can't you ebsm 19 4) won't you nevo erii eau bluorla uoY 36. Imissed the bus, so l walk to school this morning. O has 2 had 3 has to 4 had to

英語の問題です (6)の穴埋めなのですが 3分の1を入れるところでcのone-thirdを選んだのですが、答えはdのone-threeでした。 なぜcが答えじゃないのでしょうか 教えてくださいよろしくおねがいします

1.次の英文について以下の設問に答えてください。 *印の付いた単語は下に注がありますので参考にしてください。 More than 100 years ago, a *deadly flu virus circled the globe. It caused the influenza pandemic of 1918-1919. Before it was Over, this disease had *sickened an *estimated 500 million people. That was[ 6 ]ofeveryone alive at that time. Some 20million to 50 million people died.

答え合わせがしたいので教えてください🙇‍♀️

Come under this heading, and are spending an average of 4 hours each day on care. 60% d of second-year public junior high and 4.1% of second-year public senior high school students |I|次の文を読んで、あとの問いに答えなさい。(~~~~のついた語句は文末に注があります。 |was to create opportunities for the yOung to talk to a school social worker about the domestic issues that were keeping them from attending class without young people who are obliged to help with the care of a family member. It reports that 5.7% has revealed one very different reason for absence, and that is the increase in the number d In its latest study, the Japanese government is making an effort to identify the rees for long-term absence from school. Long-term absence at elementary, junior and senior high levels has various causes, not least of which is the ongoing coronavirus pandemic. The study ow the former, and more than half of the A are looking after a younger brother or siste- though the exact figure is not known. The Asahi Shimbun's article of April 14", 2021 also described the case of one shudee who was looking after a grandparent with dementia because both her parents were working and her absence from school was because she could not get up in the morning. Instead of being treated as a separate reason in itself, like a student's refusal to attend school, or sickness, or economic considerations, family care is put into the category of 'other B to highlight the problem. Despite the recent introduction of reasons'. This does not school social workers, and the understanding that domestic issues are often at the root of school absence, much more needs to be done to provide support to enable these young carers Japanese society still expects the C to have enough time to spend on their studies. family to care for its members. The mental health of these young carers is an important issue, though this problem cannot be solved unless the whole domestic environment in which they are placed Is improved. This has led to the criticism that. although the government study may hdVC nelped to identify some of these young carers, there is not enough actual support bes offered. AS early as 2015, Minami Uonuma City conducted a survey which tried to ldeirers) specific cases in which young children were acting as carers. and then started to p them with real support. D the fear that this might reflect badly on their family.

写真の、 They may concentrate and express themselves more clearly in modern Western cultures, in which spend so much time with each other. とい... 続きを読む

traits, broadly defined, sèem to show themselves in virtually all human cultures, modern or tribal. They may concentrate and express themselves more clearly(in) ehich ウ") teens spend so much time with each other. modern Western cultures, But anthropologists have found that virtually all the world's cultures recognize inwhich odola diotin

訳と in order to の使い方を教えてください。 よろしくお願いいたします。

We must do our best in order to meet the deadline.