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数学 高校生

(1)のように放物線と直線の共有点を求めるのに判別式が使われるのはなぜですか? 判別式はX軸との交点を求めるものではないのですか?

らく jm 105 放線と直線の共有点の人 ゆめ⑨⑨@9 4 と共有点をもつように, 定数々の値 (1) 放物線 yッニャ*“十3z十の が直線 ツー 範囲を定めよ。 ョ国 へ (2 2 次関数 ニー のグラフてと直線 yニー2xル の共有点の個数を調べよ。 ただし, は定数とする。 四 直線 y=g(x) の よって, ッを消去して得られる 2 次方程式の判別式がポイ AUOSM2M 「 に (1) 共有点をもつ ぐつ 実数解をもつ であるから の=0 (2) yを消去すると ァ※ー2x十を三0 となるから, 放物線 yディ”ー2ァ十ん とヶ軸の共有点の 個数の問題と同じように扱う。…… ヵ.163 基本例題 101 参照。 目角 答 (に ① とッテァ十4 …… ② からッを消去 レジ 本582ーア十4 1) の>0 とするのは 誤り! [共有点をもつように」とある ので, 共有点の個数が1 個 上である条件を考えなけれ 整理すると 2上2ァ十の一4三0 …… ③ 放物線 ① と直線 ② が共有点を もつための必要十分条件は, 2 次方程式 ③ の判別式を の とすると の=0? の 2らZNUSs証た がつく の= 2のf0デ5ーo であるから 5一oテ0 とする。 2) (2)8G, SEの g全5 RE 2 間2BEISEIITZ2N提ジッ円だして 一メメーー2ァz士 によらNiy三王x>上9x のグ

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英語 高校生

至急お願いします!! 河合模試の部分です 分かるものだけでもいいので教えてください🙏 お願いします!

B Your English teacher gave you an article to help you prepare for the debatc jm the next class. A part of this article with one of the comments is shown below Save Abandoned Cats and Dogs 応 zzdZ ey//ey, Halifax AUGUST 12. 2019・3:23 PM Many animalrescue organizations in Canada are working together to prevent Cats and dogs from being killed in shelters。 Some shelters kil up to 30% of the animals that they take in。 These animals are usually old. sick, or dangerous to other animals in the shelter Mr. Larry Brown. the director of the Lost Dogs Animal Shelter, says that his | gOal iS to save at least 90% of all shelter animals from being kiled. We Should try to save as many animals as possible" Mr. Brown says。 "They have | he right to live and be happy, just like humans" Many people in Canada agree with Mr. Brown. A recent poll found that more than 75% of Canadians | think the government should give more money to help shelters care for | abandoned animals | | However, a dog breeder Ms Hannah Smith thinks the opposte。 Cats and | dogs that arent adopted by a new family often die in the shelter or make the | other animals sick" she says. "Some of these animals try to hurt people | They must be put to sleep. Otherwise, there will be too many animals to take | Cre of" Ms Smith also believes that eforts to save every animal would cost taxpayers too much money. | Newest Michael Brown November 21.2019・7:22 PM How could Ms. Smith be so cold? Afew exta dollers added 10 our taxes saems lke a small pice to pay 0 support our local sheleers。 Were akng about lves | here! These animals deserve our respect 0 問1 問2 問3 ⑩ @ @ 9) According to the article. many cats and dogs rescued led because | 11 shelters have to keep other kinds of animals lo save the taxpayers do not wa they are old or because they have health or behavior problems hey will die sooner or later in the shelters Im a debate, your team will support the statement. "No animals should bc killed in shelters.′ In the article. one opinion (not a fact) helpful for you teamisthat | 12 cats and dogs should be able to enjoy their lives many Canadians suggest more money be spent on saving animals ⑤@ぐ@ら@ ⑤@Wぐ@@G one-third of animals in some shelters are killed some organizations are trying to save animals' lives The other team will be on the opposite side. In the ot a fact) helpful for that team is that | 13 alot of money shouldmt be spent on shelter animals cats and dogs should be kept in separate shelters shelter animals should be adopted by families some animals are aggressive and hurt people ー13 article one opinion

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