写真の9-1(1)は非同次微分方程式y=2y'x+x²(y')⁴についてですが、 g(x,p,C)=0というパラメーター表示をするために(Cを式に含めるために) 2xy'+p=0に注目して、x=C/p²というパラメータ表示を得てますが、もうひとつの解てある、1+2xp²=0... Read More

第9回演習問題 解答 (2xp'1p+4x²pp tapt) 9-1.(1) p=yとおいて両辺をで微分して整理すると (以下同様)、(1+2cp^) (2xp+p) = 0. da 2 • 2xp' + p = 0. と変形して、 log||=-2log|p|+Cより、π= よって dp P C y = 2xp+ x²p4, x = p2 というpによるパラメータ表示を得る。 3 ・1+2xp=0.p=-(2)-1/3より、y=- (2x)2/3 (2) p=p'x+2+p+2pp' b. dx == 1 dp 2 y = (2+p)x+p², -p (1階線形)。 これを解いて、 x=-2p+4+ Ce¯P/2. (3) (x- e³)p' = 0. • p=0. p= Cb, y=Cxec. • xe = 0. p = log x, y = x logx - x. (4) p = p²+2(x-1)pp' ). (2(x-1)p' + p − 1)p = 0. dx • 2(x − 1)p' + p − 1 = 0, p 1. 2(x-1) より、 dp p-1 C y= (x 1)p², x = +1. 1)2 • p= 1. y=x - 1. • p=0. y = 0. dx log p+1 (5) p = (logp+1)p'より、 を解いて、 dp P (6) (1+xp²)p' = 0. y = plogp - 1, p = 0. p=C), y = Cx-C-1. x = (log p+1)²+C. 1 •1+xp² = 0. y = xp --, 1 x = -- P p2 9-2. (1) y = sinht, y' = cosht とパラメータ表示すると、 Y = cosht- dt dx =coshtより、 dt dx = 1. つまり、t=æ+C. よって一般解はy=sinh (π+C). (2) (y-y) (y+2y) = 0. • y' - y = 0. y = Ce y' +2y= 0. y = Ce-2x dt (3) y = acost, y = bsint とパラメータ表示すると、y=bcostu = a cost. ⚫ cost # 0. dt dx a より、t=q+C.よって一般解はy=bsin (u+C) ⚫ cost = 0. sint = ±1, y = ±b.

このPsychological 〜から始まる文のさいごのto be important の部分ってどういう文法が使われているのですか？なぜtoになっているのかとどういう使い方でtoが使われているのかわからないのでどなたか教えて欲しいです🙇🏻‍♀️

A criterion you might use is whether they seem nice. Psychological research 基準 has found two universal dimensions we judge people on, namely warmth and 側 competence, to be important. These are not limited to first impressions but are

This songもあるので、makesではないんですか？

(2) この曲きっと泣けるよ。 This song will make you cry.

答えあっていますでしょうか🥹🥹

以続詞 25. ( ) she has gone to Paris on business, Ms. Brown is not here now. Since 2 Before 3 Though 4 When HST 〈城西大〉 26. () it was the end of the month, the bank was very crowded with customers. Because 2 Because of 3 While 27. We should not look down on a person ( ) he is poor. 〈城西大〉 4 During liw 一彼が貧しいからといって、私たちは人を見下してはいけない but because ⑩because 2 why jud nee8 90 3 and 4 but ~だからといって…なる松山大〉 28.( 4 When 〈工学院大〉 Doy ( 7 2A (1) 4 though <中部大〉 ) that you are old enough, you must do it yourself. ①Because ~ Now 3 Though 29. You should not keep pets (28) you take good care of them. 1 if unless otherwise 30. We will be able to accept your offer () that you assure us that the agreed price will stay unchanged. (*) decided 2 proposed "1 ③provided suggested ④ <学習院大 > sausood 31. "Couldn't you make the price on this car one million and a half?" 窪田 条件 "Well, all right, ( ) that you pay in advance." 1 in case 2 in circumstance ③ for good ④ on the condition ~という条件で/もしてならば 〈大阪産業大 > 32. ( ) the passenger sitting next to you wasn't feeling well, what would you do? ②Suppose 2 Remember 3 Think 4 Act 〈摂南大〉 もし~ならば

答えあっていますでしょうか😭😭

(訳 9. He likes ( ) the Republican Party nor the Democratic Party. neither Anor B 1 either art juods sba 2 none 1 ansiq on (2 that (3 both AもBも~ない gu④neither <亜細亜大 〉 他動の目的 ) more jobs will be available next year. had 3 what 1914 when 名詞欠けてないと使えない不完全 10. The improving economy means( C①which 11. Human beings are different from animals ( we can think and speak. 3 in that t 4 while 〈立正大〉 Gr oa C 〈新見公立大 〉 survivors of the ferry accident will be found. うしろに完全だから 1 because of 2 unless 12. Hope is fading ( 1 which (2) that 13. I asked him ( *** that 3 who 4 why ) he could swim well enough to cross the river. 横切る 2 what 3 if ~かどうか 14. Do you know (*) the teacher is married or not? aaso ni <東京国際大 〉 ) A ST felugrul Tour 4 which anol (5) gaiqa vse amoa ( ) SSP 2 what 3 whether 4 how 〈淑徳大〉 その時 jon i grz ) the phone rang. 電話がなった BA 4 what 1 that 部屋を出ようとしていた 15. I was about to leave the room, ( 1 when 2 which 16. I've wanted to visit Helsinki ( 1 since 2 until (3) that ) I was a teenager. 3 when 4 while Woll D 96) ( ) CS quorbAD 〈大阪商業大 〉 〈 立命館大 〉 ~している間

答え合ってますでしょうか😭😭

8. He couldn't arrive on time because the train was ( ). 1 late 健れて 2 lately 3 latter 志 ④ latest <東京国際大 〉 9. The fancy restaurant was full of diners, ( ) women. 2 mostly of whom were 1 almost of whom were 3 who are most 10. I was ( 1 hard 4 who were mostly 主として ) asleep when you arrived. That's why I didn't hear you knock. vbre 2 fast ②fast, quε 3. some 791 ぐっすりと 11. Their daughters, Cathy and Mary, were seven and five ( respectfully 2 respectably h0 〈中央大) JAP 4 slow 〈関西外国語大〉 ④respectful Provinu 94T TAP <愛知医科 ) for me to drink. much too+形 あまりにも~すぎる 3 respectively 21B9Y THOT 9101 12. I can't finish this coffee. It's ( 1 hot ② vion much too hot 各自に ) 3 too much hot 4 Every hot 13. You had better keep your mouth shut; () you'll get into trouble. 1 and 1912 however vlet 3 otherwise しかしながら <鹿児島大 〉 Hear 4 therefore 〈明治大 ), the tourist 02 (9) Besides t ④However fo9q send 〈日本歯科大 〉 19y D 14. I don't want to go to Europe this summer. It's very expensive. ( attractions are often too crowded. ⑪Besides So 910191941 (1) 3 Because riguror & (大) 15. I want to go to graduate school. ( 1 Therefore The Otherwise =moreover ) I must study to pass the entrance exam. 3 Or 4 Nevertheless 〈国士舘大〉

2と3教えてください

[30] 【チャレンジ問題】 ソ asos 女子7人と男子5人の中から4人を選ぶとき,次のような選び方は何通りあるか。 (1) 特定の2人A, B を必ず選ぶ。 19 4-222 10 Cr 45通 A2 特定の女子 Pと特定の男子 Q を含めて、女子2人, 男子2人を選ぶ。 () 40X249 (8) (3) 特定の女子P を含めて女子2人, 特定の男子Q を含めないで男子2人を選ぶ。

食塩を1Lの水に8.8g溶解した時の浸透圧は？(完全に電離しているものとする) モル濃度0.15M 100%電離より、0.30M となったのですが、答えは0.30Mで合っていますか？

21番です。 なぜ、対比の訳になるのか教えていただきたいです🙏

IV 次の英文を読み, 空所 19~ VR肢①~④から1つずつ選びなさい。 問題 23を埋めるのに文脈上最も適切なものを、それぞれ下の選 Sixty-five million years later, the extinction of the dinosaurs remains a great mystery. Scientists think that dinosaurs existed on Earth for almost 200 million years. 19 could these great beasts, some of which weighed thousands of pounds and stood 100 feet tall, suddenly disappear? 11 The most popular theory is that the dinosaurs were killed off when an asteroid into southern Mexico. The asteroid's collision caused earthquakes, fires, and tidal waves. Volcanoes erupted, spewing poisonous gases into the sky and lowering the oxygen level in the oceans. Plants died, removing the food source for plant-eating dinosaurs. As these dinosaurs died, there was no food for meat-eating dinosaurs. In a short period of time, the dinosaurs were gone, and the first mammals began to appear. Many scientists note that, 21 the asteroid had a major impact, the Earth's climate had already scientists claim that mammals already on Earth before the asteroid might have 22 the extinction begun to change. The planet was cooling, and the colder temperatures were likely killing plants. Some by eating dinosaur eggs. We may never know for certain what caused the extinction of the dinosaurs. But it was most likely the result of a combination of the asteroid, colder climates, and egg-stealing mammals 23 the single event of the asteroid hitting the Earth. 2024年度 全学 Casey Malarcher et al., Reading for the Real World 1, Second edition When ② 19 What 3 Who 4 How came ② carried 20 3 crashed 4 burst 21 while once 3 unless 4 yet 22 ① governed obstructed 3 facilitated 4 united 23 1 other than rather than ③ except for 4 owing to

答えは①です。どうして②はダメなのか教えて欲しいです🙇🏻‍♀️

3. The President and his wife stood ( ) by a crowd of 3000 people. ① surrounded (3) surround 2 having surrounded b H bozolo aaye aid diiw surrounding we ▸ ④To