Grade

Type of questions

English Senior High

答えを教えてください お願いしますm(__)m

O What did Eric and his wife do recently? (8点) 2 Where did Eric find his new. sofa? (8点) (b) Lent a book to their daughter. X,5 「Writing | Vocabulary Listenino GH 210 Reading I Grammar E 日CD LESSON 9)比較 TOTAL * 4 /2点 A4点 12点 Ao0点 84 32点 msD コ SBN978-4-625-00416 (a) Moved to a new house. Reading- こ4381 \00000E b 合本日 日 ta (c) Sold their old sofa. (d) Changed the wall color. 「模様替え」エリックとジェーンがEメールでやり取りをしています。 A次の英文を読んで, 問いに答えなさい。(32点) notes nim 「From: Eric Miller To: Jane Miller Date: September10 Subject: How are you doing? da え nim gud uo コ (a) On a TV shopping channel. (b) In the catalog that Jane had. ) At the shopping mall near his house. woll aiT ローニ Hi Jane, Im sorry I haven't written to you for a while. I've been a bit* busy lately: You know Mom and I didn't like the color of 。 walls so much. We finally painted them yellow last week.W。 replaced the sofa with* a new one, too. one in the catalog* you left here. comfortable than before. You should come and look! a bit ちょっと、 (d) On a furniture store website. d ecalg not lately Tho eoiombnmg vM I found a very good The living room is more a Why was Jane surprised when she read Eric's email? (8占) replace A withe AをBと取り替える → Eのヒント catalog カクロ ペー 10 (a) Her father sent her an email. (b) Her mother didn't buy a T-shirt. C L ge See you soon, )aidaidtW Dad hinstai (c) Her parents spent much money on a piece of furniture. (d) Her parents didn't like the color of the walls. なさい。 0 gnol ai tied vM 1 nim h( From: Jane Miller 関会 To: Eric Miller iad ooY 15 What will Jane do for her parents?(8点) Date: September 11 Subject: What a surprise! O ai Ana d nedd oblo (a) Clean their house. Hi Dad, 天 内( ) It's good to hear the living room is nicer now. I'm so surprised |る (b) Visit them this Sunday. (c) Invite them to her house. 7ョン。 (d) Give them cushions. YてE でが you bought a sofa from that catalog! It only has very expensive 写 furniture. I can't believe Mom agreed to buy the sofa. 20 10( u T She 古関文 won't even buya T-shirt unles、* some time this Saturday afternoon, so Ill come by* around 2 p.m. Ill bring some nice cushions for the sofa, So don't buy it's really necessary. 立リよう I have unless …でない限 7ン edood ym ils (10om \to l ailt \anijeotonei dood aidT come by 立ち寄る any. 25 d iT Love, lood vm lis Jane 36 LESSON 9 (179 words) LESSON

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Mathematics Senior High

ここの式変形が分からないので途中式含め教えていただきたいです!(2)です!

(1) 関数 f(x) = (x+a)e*" が, f'(0) =D 3, f"(0) = -2 を満たすとき、 (2) y=e-"cosbx のとき, y"+ 2ay' + (α°+6)y = 0 を示せ。 例題 155 第2次導関数 定数a, bの値を求めよ。 (式変形)… = 0を示す。 , y”を計算して, (__の左辺) y、=-ae" cos bx -be 見方を変える 三** (2) 素直に考えると… もう1度微分するのは大安 一 'sin bx これはもう1度微分しやす。 =ーay-be-a"sin bx ←- =yであるから Action》 第2次導関数f"(x) は, f(x) をxで微分せよ f(x), f"(x)を求める。 (eoxy = bee 闇(1) f(x) = 1·e + (x+a)·bex = (bx+ab+1)e*x f"(x) =D b·eo* +(bx+ab+1)·bebx = 6(bx +ab+2)ebt f(0) = ab+1==3 f"(0) = b(ab+2) = -2 mitni よって 0より ab= 2 これを2に代入すると 6=- 2 16(2+2) = -2 これより a= -4 したがって a= -4, 6= - 2 (2) y=e-ax cosbx 0とする。 y=-ae ax . cosbx+e-ax. (-bsinbx) これに0を代入して整理すると y= -ay-be-a" sinbx 2の両辺をxで微分すると さらにxで微分して をxの式で表し、ゾ- を与えられた等式に して証明してもよい 計算が複雑である。 hol …2 y= -ay' +abe ax . sinbx-be-ax. bcosbx …3 ここで,2より be-ax sinbx = -y-ay これと0を3に代入して整理すると y"=-ay' +a(-yーay)-ピッ したがって y"+2ay' + (α°+6°)y= 0 考のプロセス

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