背理法を利用した証明のやり方が分かりません💦 分かりやすく教えてください！！ お願いします🙇‍♀️🙇‍♀️

24 背理法を利用して,次の命題を証明せよ。 √6が無理数ならば√3-√2は無理数である。 25 (1) nは整数とする。 次の命題を証明

TOEICの勉強をしています。 答えはBでした。 解説にはbeの補語になる形容詞か名詞が入ると書かれていました。

15. It is important that the materials used for the building be for the climate of the area. (A) suit (B) suitable (C) suitably (D) suitability

TOEICの文法問題です。 解説のところにある「空所に入るのは形容詞か副詞」と書いてあるのですがなぜ形容詞か副詞なのですか? 解説お願いしたいです🙇‍♀️

□ 28. Half of the board members of Bell Corporation are appointed on two-year basis. (A) rotate (B) rotates (C) rotating (D) rotation のuhuc ylc 日分

有機化学についての質問です。 アルコールもカルボン酸もOHがあって極性があるのに、アルコールは中性でカルボン酸は酸性なのは何故ですか？

解答あり 最後の(4)が分かりません､､､ 答えは(3)6.4 (4)2.0×10^-4 です。

VPT II 炭酸 HECO3は2価の弱酸であり,次のように電離する。ここでK,, K2は各段階の電離定数である。 K= 4.0×10-7mol/L K, = 5.0×10-11 mol/L HCO3 H* + HCO3 HCO3 H+ + COg?- 2H+ + CO- で表される。 ーク 問4 HCO3 が完全に電離するときの反応式は HCO3 この電離式の平衡定数Kの値を, 単位を付して有効数字2桁で求めよ。 4.0×(0x5:0×10~" -20× [D e - 2-Dr() 図1は HECO3の水溶液に水酸化ヒナトリウムを加えていったときの滴定曲線であり, 図2はその ときの pH と物質(イオン) a,b,cの存在割合を表したグラフである。 問5 pH H2CD3 HCD3. C03 1.0 C a 0.5 7 X 0 - pH d mL 図1 図2 (1)図1で,Xの付近は水酸化ナトリウム水溶液を加えても, PHが大きくは変化していない。 この ように酸や塩基が少量加えられても PHの値をほぼ一定に保つはたらきを何と呼ぶか。 (2)図2のa,b,c はそれぞれ H.CO。 , HCO。-, CO3- の化学種の一つである。 bはどれか。 (3) 図2でaとbの存在割合が共に 0.5になる点( d )のPHを求めよ。ただしlog02=0.30 とする。 4)密閉容器に水と二酸化炭素を入れ, 圧力をかけて溶解させた。H:CO3の濃度が 0.10 mol/Lに なったときの水溶液の水素イオン濃度を, 有効数字2桁で求めよ。 化学種の存在割合

最後の一文がなんでmeなのか分かりません､､､ I(i)じゃダメなんですか？

[2 The student had a point. Her generation was indeed different. The world was different. Ina single generation, it had changed utterly. (Not so very long agg.(when I myself had gone off to collegg, I'd ( 3 ) the familiar world behind and lived on campus, body and soul. Although there were weekend parties, it had been very much a monastic* experience. Separated from home, Td ( 4 ) one layer of self after anotherpand, ( 5 ) on new ideas and new practices, and (by the end of those four year$ I had ( 6 ) to become someone the younger me never managed would have ('mGpig piged

CROWN3のlesson2です。 ☆の文構造と訳が分かりません､､､ よろしくお願いしますm(_ _)m

David Hume famous Scottish thinker(n the 18" centur)、 お made a clever point_ībout miracles! He began (by defining nature) Stopping or starting or turning a frog into a miracle as a breaking bf the laws of a watch (by the power of thought along, a prince would be good exampleg bf breaking the laws of natur. Miracles like that would be very disturbing (indeed) to science. 46 Disturbing if they ever happened, that is! So how should we respond to stories of miracles? This was the question Hume turned to, and his answer was the clever point I mentioned. If you want to know Hume's actual words, here they are: “No testimony is sufficient to establish a miracle, unless the s testimony be of such a

CROWN3のlesson1です 下から2行目のimpressは、どれとandで結ばれてるんですか？ startですか？phoneですか？ よろしくお願いします<(_ _)>

toward it, thinking hat something funny is going op? In this casq. 20 we can easily provide a reasonable explanation Jor digital watches, but (in the days) (when watches had springs this apparently weird happening. It's probably less true of <imply picking up a stopped watch could sometimes restart it 97) as the sudden movement started the balance wheel. This can 25 happen more easily (if the watch is warmed up) and the heat Jrom,a person's hand] can be enough to do that. It doesn't happen often |but it doesn't have to(when you have 10,000 people, lall and then clutching them (n watcheg has to start in order for the owner to phone in the new) over the country! picking up their stopped watches warm handg Only one of the 10,000 n great excitement and limpress the entire television audience. We never hearabout the 9,999 watches that didn't restarl) Testaniy

CROWN3のlesson1です。 星が付いてる文の文構造と訳が分かりません。 カッコとかは気にしないでください。 よろしくお願いしますm(__)m

toward it, thinking Kaat something funny is going op? 20 In this casg, we can easily provide a reasonable explanation for this apparently weird happening. It's probably less true of digital watches, but (in the days) (when watches had <imply picking up a stopped watch could sometimes restart it 9) as the sudden movement started the balance wheel. This can 25 happen more easily (if the watch is warmed up) and the heat a person's hand can be enough to do that. happen often,but it doesn't have to(when you have 10,000 It doesn't people, lall over the countryl picking up their stopped watches and then clutching them (n warm hand handg Only one of the 10,000 0 watches has to start in order for the owner to phone in the news in great excitement and impress the entire television audience. We never hear about the 9,999 watches that didn't restart.

詳しく解説してほしいです！お願いします！

電離と電離度 1) 0.10 mol の酢