至急です‼️英文が合ってるか確認していただくだけで大丈夫です。長くてすいません。 ①One problem in the Tokyo metropolitan area is unopened railroad crossings. 首都圏で問題になっているのが開かずの踏切... 続きを読む

数学のチャート式の問題です！ 自分はこの2つの方程式がどっちも＝0だったので２つの式の左辺同士をイコールで結び、共通解をαと置いて計算しました。それが、2枚目の写真のものです。ですが、それだと解答が間違っているようです。 なぜ自分の解答ではダメなのか、なぜチャート式の解... 続きを読む

重要 例題 方程式の共通解 2つの2次方程式 2x2+kx+4=0, x2+x+k = 0 がただ1つの共通の実数 解をもつように, 定数kの値を定め、その共通解を求めよ。 CHART S OLUTION 方程式の解 共通解をメとおくる x=α が解⇔ x=α を代入して方程式が成り立つ もんだいは 2つの方程式の共通解を x=α とすると,それぞれの式にx=α を代入した 2a²+ka+4=0,a2+α+k=0 が成り立つ。これをα, kについての連立方程式 とみて解く。実数解という条件に注意。 解答 共通解を x =α とすると 2a²+ka+4=0 •••••• ・①, a²+a+k=0 ①②×2 から (k-2)α+4-2k=0 すなわち (k-2)a-2(k-2)=0 よって ゆえに [1] k=2 のとき 2つの方程式は, ともに x2+x+2=0 となる。 その判別式をDとすると (k-2)(a-2)=0 k=2 または α=2 D=12-4・1・2=-7 D<0であり,実数解をもたないから, k = 2 は適さない。 [2] α=2 のとき ②から 22+2+k=0 このとき2つの方程式は 2x2-6x+4=0 ゆえに k=-6 ...... (2) 基本 75 ...... ・①', x2+x-6=0 となり,①'の解はx=1, 2 ②' の解はx=2, -3 よって,確かにただ1つの共通解 x=2をもつ。 [1],[2] から k=-6, 共通解はx=2 x=α を代入した ① と ②の連立方程式を解く。 α² の項を消す。 共通の実数解が存在する ための必要条件であるか ら,逆を調べ十分条件で あることを確かめる。 ←ax²+bx+c=0 の判別 式は D=62-4ac 2(x-1)(x-2)=0, (x-2)(x+3)=0 (INFORMATION この例題の場合,連立方程式 ① ② を解くために,次数を下げる方針で α2 の項を消 去したが,この方針がいつも最も有効とは限らない。 下の PRACTICE 79 の場合は,定数項を消去する方針の方が有効である。 PRACTICE... 79 ④ の方程式ター(k-3)x+5k=0,x+(k-2)x-5k=0がただ1つの共通解をもつ ように定数kの値を定め、その共通解を求めよ。 2020vi S

Calculate pH for the aqueous solution of a mixture of 0.1 L of 0.2 M AcONa and 0.1 L of 0.1 M AcOH. (pKa of AcOH = 4.76, log2 = 0.3, log ... 続きを読む

英語が苦手な専門学生です。 もう本当に苦手すぎて問題すら分かりません。 教えて貰えれば幸いです😔

Yumi: This is a very beautiful doll. I like it a lot. Can I touch it? Marie: Yes, of course. Ah, watch it! This doll is about 100 years old, so it is delicate. very Yumi: Wow, 100 years old! It is very old. Where did you get it? Marie: I found it at a flea market in Paris five years ago. Yumi: And... how much was it? Marie: It was about 20 euros at that time. Yumi: 4 were really lucky. (注)watch it 気をつけて (itの代わりに out や yourself を使うこともある) delicate 壊れやすい a flea market 蚤の市 euro ユーロ (EUの公式貨幣単位) 1 下線部 ①,③, ④の文章を How もしくは What で始まる感嘆文に書き直しなさい。 ℗ How very beautiful this doll is! 3 What an old it is! 4 2 下線部②の命令文 「気をつけて!」と同じ意味になるよう,( 入れなさい。 Watch it = You (be an ) be careful. my 3 英文を読んで,次の問いに英語で答えなさい。 1) How old is Marie's doll? 2) When did Marie get the doll? 3) Where did Marie get the doll? 4) How much was the doll at that time? 内に適語を C O

What major are you?の答え方で I’m a pharmaceutical science major. で大丈夫でしょうか？

すみません。なにも理解していません。教えていただけると嬉しいです。

n 30%の確率で不良品を作ってしまう工作機械があるとする.この機械が製品を4個作った とき,そのうち2個が不良品である確率はいくつ また,不良品が2個以下である確率はいくつか。 演習問題 六郎で、通続型 十 類の回さ) 不良品が2個の確率 本ロ p n

なぜisじゃなかてareなのでしょうか？

Grammar questions-Ifthe four choices are different forms of the same word, you are asked to utilize your grammar knowledge. One obligation of new employees to fill out the appropriate personal information form. (A) be → The answer choices are different forms of 'be.' For this kind of question, you should approach the question from the grammar point of view. The subject is singular, so the answer is (B). ex. (B) is C) are (D) being

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未習長文E インフォメーションリスト untrustworthy profession psychology not able to be relied on as honest or truthful ajob that needsa high level of education and training the study of the mind and how it influences people's behavior often rewards society often understands and accepts lying. S0ociety deception. 0cupation |confess a job or profession to admit, especially to the police, that you have done something wrong or illegal Something successful or impressive that is achieved after a lot of effort and hard work someone who trains a person or team in a sport a manager in an organization or company who helps make important decisions to express your disapproval of someone or something, or to talk about their faults accomplishment coach executive criticize at times sometimes%;B on occasions an idea or story that many people believe, but which is not myth true exaggerate to make something seem better, larger, worse etc. than it really is to not include someone or something behavior in which you deceive or cheat people relating to feelings of love or a loving relationships intended to make someone believe something that is not leave out dishonesty romantic deceptive ture Conversation an informal talk in which people exchange news, feelings, and thoughts something that is very bad or a failure, especially when this is very annoying or disappointing not often; seldom disaster seldom

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ER 試験に出る単語など 未習長文A インフォメーションリスト 単語など 定義·例文情報 現代美時信: Contemporary | contemporary art works be pleased to Japan Museumis pleased to present 'Sōsaku hanga. exhibition Collection of things, for example works of art, that are shown to the public. feature The hotel features a magnificent ocean view. Lacquerware are objects decoratively covered with lacquer. The work of a joiner. lacquerware joinery Coat a metal coated with gold Lacquer sap has been used by humans from long time ago. It was treated as a luxury item. sap resistant heat-resistant moisture small amount of water that are present in the air. decorative a decorative design sprinkle Silver powder is sprinkled on its surface. appear Dimples appear on her cheeks when she smiles. range We sell a wide range of goods. a box, bottle, etc. a pot or other object made of clay that has been made permanently hard by Container ceramic heat bowl tea bowl glue a sticky substance that is used for joining things together transform The new bridge will transform the island's tourism industry. emphasize give special importance to something highlight emphasize imperfection a fault or weakness in something a skilled person, especially one who makes beautiful things by hand craftsman specific specific regions of Afirica metallic powder metallic

青い字の品詞を変える問題なのですが、1と6を教えてください！なぜそうなるかの説明をお願いします🙇‍♀️🙇‍♀️ ちなみに、答えは1はcynicalて6はassessment です！

~y 副 hon ロ ble 形 Word Forms: Fill in the blank in each sentence with the correct form of the word on tha. 1. cynicism The critic is known for his worldview.)) S V 22 achieve The award recognizes his many great 3. promote My boss saidI will get a next year. 4. distribution Please these test papers to the class. 5 specifically Do you have a restaurant in mind? 6 I disagree with your of the movie. aSsess 7. optimistic speaking, economic recovery will take at least a year. urgently I cannot overemphasize the 1時度に 先する of the situation.