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数学 高校生

重要例題99 についてです! (1)の[1]a(a-2)≠0などの条件がなぜそうなるのかが わかりません😭😭 条件の作り方(?)わかる方教えてください

重要 例題 99 文字係数の方程式 は定数とする。 次の方程式を解け。 1) (a²-2a)x-a-2-(2) 2ax²-(6a²-1)x−3a=0 (1)Ax=Bの形であるが,Aの部分は文字を含んでいるから, 次のことに注意。 A= 0 のときは、両辺を A で割ることができない (「0 で割る」ということは考えない。) A = 0, A = 0 の場合に分けて解く。 00000 立 重要 38 基本95 割 STOP= (2) 問題文に「2次方程式」とは書かれていないから,x2の係数が0のときと0でない ときに分けて解く。 CHART 文字係数の方程式 文字で割るときは要注意 0で割るのはダメ! (1) 与式から 解答 a(a-2)x=a-2・ ①前の符 ...... + (*) (xの係数) = 0 のとき は、最初の方程式に戻って [1] α(a-2)≠0 すなわち a≠0 かつ a=2のとき カ...... - 考える =(x-2)+ ゆえに a-2 x= a(a-2) 1 x=- av [2] a=0 のとき (*), ① から 0x=2 これを満たすxの値はない。 検討 Ax=Bの解 [3] a=2のとき,①から 0.x=0 これはxがどんな値でも成り立つ。 0-(4-x)(x → 2. 05 a≠0 かつα=2のときx=1 a したがって → a=0のとき 解はない a=2のとき 解はすべての数 (2)[1] 2a0 すなわち a=0 のとき, 方程式は すなわち, 解は x=0 [2] α≠0 のとき, 方程式から よって (x-3a) (2ax+1)=0 1 x=3a, 2a 1564-1[a=0®×¥_x=0 したがって x=0. A≠0のとき x=- A=0 のとき (3) BA B0 なら 0x=B 解はない (不能) B=0 なら0.x=0 解はすべての数 (不定) (x2の係数)=0のときは、 最初の方程式に戻って考 える。 1 -3a -6a² 2a 1 1 2a -3a -(6a²-1) 1 a≠0のとき x=3a, 2a a = 0 のとき 3a キー 2a

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英語 高校生

英検準一級の要約問題です。 添削していただけないでしょうか?🙇‍♀️

英検公式サンプル問題 ⚫ Instructions: Read the article below and summarize it in your own words as far as possible in English. ⚫ Suggested length: 60-70 words Write your summary in the space provided on your answer sheet. Any writing outside the space will not be graded. From the 1980s to the early 2000s, many national museums in Britain were charging their visitors entrance fees. The newly elected government, however, was supportive of the arts. It introduced a landmark policy to provide financial aid to museums so that they would drop their entrance fees. As a result, entrance to many national museums, including the Natural History Museum, became free of charge. Supporters of the policy said that as it would widen access to national museums, it would have significant benefits. People, regardless of their education or income, would have the opportunity to experience the large collections of artworks in museums and learn about the country's cultural history. Although surveys indicated that visitors to national museums that became free increased by an average of 70 percent after the policy's introduction, critics claimed the policy was not completely successful. This increase, they say, mostly consisted of the same people visiting museums many times. Additionally, some independent museums with entrance fees said the policy negatively affected them. Their visitor numbers decreased because people were visiting national museums to avoid paying fees, causing the independent museums to struggle financially.

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英語 高校生

線を引いた部分について 意味的には100ドルを支払えますか?みたいな感じだと思うのですが、なぜstretchなのかわからないです。stretchの意味を調べましたがそのような意味はないと思いました。これは話の流れで理解するものなのでしょうか?

4. 解答用紙を折り曲げたり、 破ったり、また汚したりしないでください。 Antiqminishes boodie alle gu [I] A. 次の会話文の空所 (1)~(5)に入れるのに最も適当なものをそれぞれA〜Dか ら一つずつ選び、その記号をマークしなさい。 nwomin Aika is an exchange student visiting her university's medical center. aliquab G Receptionist: Hello, how may I help you today? Aika: 19bnu Um, I'd like to see a doctor, please. lobus A (8) (1) Receptionist: Certainly. Is this your first visit here? plent Aika: Yes. (2) Receptionist: Then could you please show me your student ID and fill in this form? Aika: Sure. Hmm, I just have a couple of questions about the form. I don't have a mobile phone yet, so what should I put for the phone number? (3) Receptionist: No problem. Aika: And I haven't got a reference number for my medical insurance yet. Receptionist: Well, if you don't mind paying in cash this time, the insurance company will pay you back later. Aika: I don't have a lot of money on me. (4) Receptionist: The full price is about $100. Can you stretch to that? Aika: And a final question-under (5) "current medication," should I include the Chinese herbal tea I drank this morning? Receptionist: Absolutely. The doctor will want to know about that. even (1) A. Could you tell me what they look like? RENA[I B. Can you let me know where I can find one? - C. I've got a terrible stomachache. D. You look like you're in pain. om dan wood one damele batelas Yood bas att rafio el to smo sval of broot saw has ow gr(2) A. I'm so excited to be here. ede, B. I've just started my courses. sobiro ni C. My work here begins today.no ai rad bertD.I'm sorry I didn't visit sooner. Jus Teris auomal guidoned not eldiamoques legal bele saw ad? 8891 (3) A. You can leave that blank for now.uldn't best aid ea find at etoned blow bename Jedi broco 19 oved B. You can use my phone instead. deb a a mood eva C. You can buy one here right now.sed airmailqmens D. You can write any number you like. Thesisng Dia 16M AJ beate-owd limonu od taustasted to our yana(4) A. I gave most of it to the insurance company, of in Wila to odoriq B. I think doctors are rich enough already. IM ser osobinal quodblA C. What special deals do you have this week? ani i Ted toode D. How much will it cost to see a doctor?sil a'mi nio (5) A. If you help.alq at alex sgud a bad sale sing a toll ow odni B. I think so.ew mos voso as vltam) C. I exercise daily. so ed bongings to d tado got n D. That's easy!omberg-bang of sh saisius has (ma gained a suo ad size does an hot blow B ban 01 nowwted bags wat bewoldt ST! al galain bootevbA ada ad quos how all of unir containing herbe still ge-2() g) <-2-

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