図形の問題です💦(2)の解き方が分からないので教えて欲しいです！ちなみにメネラウスの定理でRO:OC＝1:4まで求めました。

15 4 *14 △ABCの辺AB, AC を 1:3に内分する 点を,それぞれR, Q とする。 線分BQ と CR の交点をOとし,直線AO と辺BCの 交点をPとする。 (1) BPPC を求めよ。 (2) 面積比△OBC △ABC を求めよ。 B R, A Q C

計算過程が分かりません😭より詳しく書いて欲しいです🙏🏻🙇🏻‍♀️

94 n! rnCr=r°(n=r)!r! (n-1)! = n° (n-r)!(r-1)! 1 (n-1)! = n° {(n-1)-(r-1)}!(r-1)! =nn-1Сr-1

計算過程がよくわかりません。矢印間にどのような計算が行われていたのか教えていただきたいです🙇🏻‍♀️

(ii) n-1Cr-1+n-1 Cr (n-1)! = + (r−1)!(n—r)!r!(n-r-1)! (n−1)!{r+(n−r)}___(n−1)!n n! r!(n-r)! .. nCr=n-1Cr-1+n-1Cr (n-1)! = -=nCr = r!(n—r)!r!(n—r)!

至急回答お願いします🙏英語です

At this robot cafe,humanoid robots ア serve_customers.These robots can take your orders and bring your drinks. They are operated by people with severe physical disabilities, so they can work outside even if their real bodies are at home.イ [were robots by these created] Yoshifuji Kentaro. By_(______)__his robots, people with disabilities can participate more in society even if they cannot go outside. 問題 14 未解答 (1) 下線部アについて、ここでは具体的に何を することを表すか。 選択肢より選べ。 1つ選択してください: ○ 注文を聞き、 飲み物を作ること ロボットを操作すること 注文を聞き､飲み物を運ぶこと

オレンジマーカーの部分の変形のやり方を教えていただけませんか？ 物理の問題ですが、数学的変形であると思うので数学カテゴリで質問しています🙇🏻‍♀️

よって、 コイル内の磁場の磁束密度はより CAN YON (3) wBa² B=Bo+Bs=Bo+μonI=Bo+μon. 2R 2RB 2R-ona²w :. (BF シ)(*) より B=Bo XY₂² 21 I= 2R se my se SS ST BB七山 2RB 2R 2 ² w L a² wBoa 2Rμo²

英検2級のライティングの添削お願いします。初めて書いたのでどのように書けばいいとかがあまり分かっていません。教えてください。

I agree to that important understand to it is necessary for historical histor better. reasons. There fore, I think that to go to for people sites I have historical Sites, First, If people goes to important they can experience many things. For example, to kiyomizu temple, they sen when they goes Can see how big and height. Then they will = feel good or impressive. In history class, They T listen to the teachers word. It is boring. just However, By going there, their motivation Second, The technology develops increases. in historical sites. There are many device to learn history. When I to himeji aastle, I played the quiz and watched big screan. went for people order important understand history in historical history better. is necessary sites order 127 hords in 47

[ の部分でRを消去しているのはわかるんですが、式がどうなっているのかが分からないので解説お願いします🙇‍♀️

54 ある植物の種子の発芽率を信頼度95%の区間で推定すると き、その誤差を5%以内にするためには,この種子を何粒以上 まけばよいか。

このページの問題の解き方が分かりません。 そもそも二項定理というのは適当に数字をあてはめて使うんですか？ 教えて下さい🥲🙏🏻

18 基本例題 5 次の値を求めよ。 (1) Co+C1+nC2+......+nCr+......+nCn (2) nCo¯nC₁+nC₂-······+ (−1)'nCr+······+(-1)" nCn (3) nCo-2nC₁+2²nC₂-······+(-2)'nCr + ······+(-2)" nCn Momwo 二項定理を利用する式の値売開 CHART & SOLUTION C に関する式の値 = の等式に適当な値を代入 二項定理と似た問題ととらえて, 結果を使うことにする。 二項定理において, α = 1, b=xとおいた次の等式 解答 二項定理により (1+x)"=nCo+nCx+nC2x2+...... Crx+......+nCnx をスタートにして、この式の右辺のxにどんな値を代入すると与えられた式になるかを考 える。 (1+x)"=nCo+nC1x+nC2x2+・・ +nCrx+......+nCnxn (a+b)"=„Coa”+nC₁α”¯¹b+nC₂a”¯²f²+...+nCra²-¹b²+...+nС₂br (1) 等式 ① に, x=1 を代入すると [FOTO'z] 'C+0) (0) よって (1+1)=nCo+C1・1+C2・12+...... + Cr.17 よって 097=75x8x0=4 +......+nCn.1" nCo+nC1+nC2+......+nCr+......+nC =2" よって この等式については, (2)等式 ① に, x=-1 を代入すると p.19 ③ を参照。 (1-1)"=nCo+nC₁ (−1)+nC₂⋅ (−1)²+ + ₂Cr (-1) 0 ₂Crx² #³ (−1)²„Cr となればよいから, x=-1 を代入する。 ++nCn (-1)" n Co-nC1+nC2+(-1)*nCr +......+(-1)" C = 0 (3) 等式 ① に, x=-2 を代入すると (1-2)"="Co+C1・(-2)+C2・(-2)+..+nCr. (-2)” p.12 基本事項 4 +......+nCn・(-2)" nCo-2nC1+22 C2+(-2)*nCr +..+(-2)*nCn=(-1)" PRACTICE 5⁹ Co-1....+(-1)の値を求めよ。 2 2 nCrx² ³ nCr X TI ればよいから, x=1 を 代入する｡ ← ① の "Crx™が S (-2) C, となればよい から, x=-2 を代入す る。 数学」 る。 3 1 異 nC ①

出来れば全ての問題解説して欲しいです！ 分からない問題などある場合はわかるとこだけでも結構です！すみません至急お願いします🙇‍♀️

2 次の英文を完成するために最も適当な語句をa~d の中から選んで解答用紙にa~dで 記入しなさい。 (1) I wish they would ( a. leave (3) Let's go by taxi, ( a. will you (2) Can you give me a call when you ( a. will arrive b. arrived (4) I was ( a. said (5) He didn't know ( a. what (6) They enjoyed ( a. study (8) Weather ( a. permits b. put ) me alone. (10) I ( )? b. shall we a. shouldn't (7) Do you know what language is ( a. spoken b. to speak c. make b. where ) to by a foreigner at the airport. b. told c. spoken ) at the train station. c. are arrived c. won't you d.get ) to consult with when he was young. c. when ) in Brazil. c. speaking (9) The buses here are often late since the traffic is ( a. heavy b. much c. a lot d. arrive ) help crying whenever I hear that song. b. mustn't c. can't d. don't we ) with the students came from African countries. b. to study c. studying d. studied d. informed d. whom ), the final game will be held tomorrow morning. b. permitting c. to permit d. of speaking d. permitted ) during rush hour. d. slow d. won't

回答お願いします🙇

UNIT 7 Reading Reading 33点 10点 Grammar /32点 /15 Information Listening Writing /10 TOTAL 100点 全文 音声 なまけ者のトムが望んだ仕事とは何でしょう。 Tom was a very lazy man*. He didn't like hard work. But he needed a job. One day, (his/Tom / a job / asked / uncle / him / find / to ). "What kind of job?" asked the uncle. Tom answered, "I don't want to work. I want meat for lunch every day. I just want to walk around and take naps*. And I want 100 dollars a day." "( )" the uncle sighed*. 2 One day, Tom got a call from his uncle. "Tom, I found the perfect job for you. A tiger at the zoo died recently. They need a new tiger. You can be the tiger. You'll wear a tiger's skin and walk around, eat meat, and sleep in the cage* like a real tiger." "( 3 )" said Tom. "I'll start tomorrow!" 5 3 The next day, Tom was in the cage in tiger's fur. He just walked around, ate meat, 10 and took a nap. Tom was happy. 44 Suddenly, he heard an announcement*. "We'll soon have a special show. It's a fight between a lion and a tiger! Enjoy this exciting show." "( )" He looked around his cage. Then another cage was carried next to his. A fierce-looking* lion was in it. "I'll be killed!" he cried. The doors of both cages were opened. Tom jumped back. "( 6 )" 15 The big lion slowly walked toward him, roared*, and opened its mouth. "Stop! I'm not a tiger! I'm a man!" 5 "Shhh!" Tom heard a small voice from the lion. "( Ⓒ )” (252 words)