C'がx軸と異なる点で交わることを確認していなくてもax^2+2(a+1)-3a+1=0を解の公式で解けばxには2つの解があることを分かると思ったのですが、なぜ確認しなければならないのですか？

EXERCISES ②76 αは自然数とし, 2次関数y=x2+ax+b (1) b=1のとき, ①のグラフがx軸と接するのはα= のときである。 (2) b=3のとき, ①のグラフがx軸と異なる2点で交わるような自然数αの中で, α<9 を満たすαの個数は である。 [類 センター試験] 101.102 の値は である。 (一 12 グラフと2次方程式 ③77 aは定数とする。 関数 y=ax²+4x+2のグラフが,x軸と異なる2つの共有点をも つときのαの値の範囲は x軸とただ1つの共有点をもつときのa であり, as 1 batc>u51E ①のグラフを考える。 ) -102 ③78 2次関数y=ax²+bx+cのグラフをCとする。 C をx軸方向に3,y 軸方向に5だ け平行移動したグラフをCとする。 C を表す 2次関数が y=ax²+ (2a+2)x-3a+1であるとき (1) b,c を α で表せ。 (2) C'がx軸から切り取る線分の長さが19であるとき, αの値を求めよ。 -103 [京都学園大] ②79 (1) 放物線y=-x²+2(k+1)x-k² が直線y=4x-2と共有点をもつような定数k の値の範囲を求めよ。 (2) 座標平面上に、 1つの直線と2つの放物線 L:y=ax+b, C1:y=-2x2, C2:y=x²-12x+33 がある。 L と C およびL と C2 が, それぞれ2個の共有点をもつとき アロα2イロロー□<b<a²が成り立つ。ただし, a>0とする。 [ (2) 類 近畿大] <->105 77654197) *#${[85x5\>u! ③802 次関数y=ax2+bx+cのグラフが, 2点(-1, 0),(3,8) を通り, 直線y=2x+6 に接するとき, a, b,c の値を求めよ。 [日本歯大] ➡105 169 3章 12 グラフと2次方程式

間違ってるとこあったら教えてください

英語 6 次のグラフ及び英文を読み、1から3の質問の答えとして最も適当なものを,それぞれ①~④ 23 のうちから一つずつ選びなさい｡ 解答番号は Not very familiar 18% Somewhat familiar 25% Not familiar 7% 21 Survey on Esports - 7 - Very familiar 50% Kazuhiro's dream is to be a professional esports player in the future. Esports stands for electronic sports. It is a form of video game competition. Sometimes tournaments for money are held and many people watch them online. Kazuhiro's friends introduced him to esports a few years ago, and he quickly became one of the best players among his friends. He has also participated in many local esports tournaments with them, and their team always won first or second place. Because of this experience, he started thinking of becoming a professional esports player. In one of his classes, Kazuhiro had to make a newsletter for his assignment. He decided to do a survey on esports. He found that some of his classmates were not familiar with esports. So, he thought he would try promoting it in his high school. He held an esports event for his classmates at school. He was not sure whether anyone would come to this event, but to his surprise, many students attended and enjoyed his workshop. He showed them some of the most famous video games in esports. He also gave them some advice on how to win. Finally, he did a live esports demonstration and played against a friend in another country. After this, a lot of his classmates asked Kazuhiro about esports. He felt pleased and satisfied with what he did. Now, he not only wants to be a professional esports player, but also be a person who can promote it. Through esports, he has been able to make friends all over the world, and he wants to spread the joy to other people. 2023KN1A-14-008 1 According to the pie chart, which of the following is true? 0 Less than 50% of the students are familiar with esports. 2 More than 90% of the students are not familiar with esports. 3 Twenty-five percent of the students are not familiar at all with esports. 4 Seventy-five percent of the students are familiar with esports. 2 According to the passage, which of the following is true about Kazuhiro? He wants to be a professional esports player. He wants to create a new video game in esports. He has a negative image of esports. 4 He has already won a lot of money from playing esports. 2 3 3 According to the passage, which of the following is true about Kazuhiro? He got confused when his friends asked him questions about esports. 2 He held an event to teach his classmates about esports at his school. 3 He was disappointed because not many people came to his workshop. 4 He learned about a professional esports player from his classmates. - 8 21 英語 22 23 2023KN1A-14-00

四角4の"These programs and 〜〜around"の一文の意味が上手くとれません。どなたか品詞分解とともに教えて欲しいです。。。

10 labor force if the country do 4 For non-Europeans, securing a work permit can take three months, so the labor law is a huge help, said Michael I. Glenn, CH2M Hill's director of international operations. “These programs and projects that we do are of a scale 20801.2 that we have to move our expertise around," he said. her nool of potential omplores

UNITE2.5のreason5の解答を無くしたため教えていただきたいです。 至急よろしくお願いします

occasions at school, most school songs (2) sometimes (3) gal ni owoq low. 22 by famous musicians, but these days, anoijasu school songs themselves. 5 Fill in each blank so that each pair has almost the same meaning. answer the questi CH? the pass China gave Japan two pandas in 1972 as a symbol of friendship. ) ( ) ( (1) Two pandas from China ( 18.0 1972 as a symbol of friendship. CO JounA few villagers saw a gang go into the bank by the back door. (2){ ) ( ) ( kids together. (3) In ancient times, food and water were shared and kids ( C A gang was ) into the bank by the back door. In ancient times, the whole community shared food and water and took care of The law in this country says children under 12 (2) その絵は古い博物館で発見された。 ) ( ) by the whole community. 6616 Americans have known this Japanese song since it came to the U.S. in the 1960s. (4) This Japanese song ( ) ( ) ( ) ( ) Americans since it came to the U.S. in the 1960s. Vocabulary [] [自然] 7 Choose the best option. (1) My father works at a research center for the ( a. reservation b. typhoon c. forecast ) Japan in ) ( MEME UT 6 Put the Japanese into English. (各4点) ni TewanА Sygiene soubor vidsdong a19vh baensqet 916 VIWA (1) この国の法律では, 12歳未満の子供を1人にしてはいけないと定められている。 redog on (3点) Hints on 19lov frilastol ◆ This chain restaurant can be found only in Okinawa. [沖縄だけで見ることができる] 21 1920 19dew (altas709 ◆ This cheese is made at a local farm. [地元の農場で作られる] slup A bak roda alone. 6 (2) (S) ) of rare plants. d. conservation ide om s

(3)の問題です。 どうして17通りなのかわからないので教えてください。

2 数字を書いた5枚のカード, 図 があります。 これらのカードをよくきって, 1枚 ひきます。 ひいたカードをもとにもどし、 もう一度 よくきってから, また1枚ひきます。 最初にひいた カードの数字を、 次にひいたカードの数字を見て 表します。 E 右の図のように 1 辺 が6cmの正方形ABCD があります。 4点E,F,G, Hをそれぞれ辺AD, AB, BC, CD 上に, AE =rcm, y A F AF = ycm, EG⊥AD, G FH⊥ABとなるようにとるとき, 次の問いに答えな さい｡ (7点×3) (1) △AFEの面積が2cm²となるとき,yをxの式 で表しなさい。 △AFE=1 × AE × AF=2より, 1 ×x×y=2 4 B (2) FBGが二等辺三角形となる確率を求めなさ (51) の5通りだから. 17 25 カードのひき方は、 全部で5×5=25(通り)。 △FBG が二等辺三角形となるのは (x, y) = (1, 5), (2, 4), (3, 3), (4. 2), D CH 5_1 25 5 (3) 四角形EFGHが線対称な図形となる確率を求め なさい。 (x,y)=(1,1), (1,3), (1,5), (2, 2), (2, 3), (2, 4), (3, 1); (3, 2), (3, 3), (3, 4), (3, 5), (4, 2), (4, 3), (4, 4), (5, 1), (5,3),(5,5)の17通りあるから、

難しいです。 全体教えてくださいm(_ _)m

日本 ( 6 15 二次方程式 ② 28 - 数学 答 2 縦の長さが18m 横の長さが25mの長方形の土地があります。 この土地に、 「右の図のように幅の等しい道と4つの長方形の花だんをつくります。 4つの花だんの面積の合計が330m²になるようにするとき. 道の幅は何m にすればよいですか。 (解答) 道の幅をxとすると, 1 自然数Aを2乗した数に自然数Aを加えるところを, 自然数Aを2乗した数を2倍してしまったので、計 算結果は342 だけ大きくなりました。 このとき、 自然数Aを求めなさい｡ (解答) 自然数をxとすると. アドバイス 答 AP, AQ の長さを, xを用いて表して考えてみましょう。 学習 8 月 3 AB=20cm. AC=25cm, ∠BAC=90°の直角三角形があります。 右の図 のように, 辺AC上にAD=5cm となる点Dをとります。 点Pは辺AB上 を頂点Bから頂点Aまで動き, 点Qは点Pと同時に動き出し, 同じ速さで 線分DC上を点Dから頂点Cまで動きます。 B △APQ の面積が68cm²になるのは, 点Pが頂点Bから何cm 動いたときですか。 (解答) BP=rcm とすると, 答 道 花だん 25m 8 A 18m

線分の和訳教えてほしいです。

100 Wri 5 every 16 words on a page. Take any book, or magazine, and list all the words appears about 3.2 in order of frequency. You will find an interesting pattern. Of-the second most common word percent of the time. That's one-half (1/2) of the frequency 10 of the. And, the third most common word, makes up around 2.2 percent of words. That's around one-third (1/3) of the frequency of the. Do you see the pattern? The number of times each word appears is linked to its position in the list. For example, the eighteenth most frequent word, as, appears 15 one-eighteenth (1/18) as often as the word the. That's around 0.4 percent of the words in any book. - C on frequenc the be ~と

写真の答えは①ですが、なぜ③は不敵なのですか？

721 88 洋女子大 Please take ( ) with you and tell me what you think of them tomorrow. 1 these letters of his 2 these his letters 3 his letters of these (4) his these letters one RCD tert M&A NO oit absin escnt nerti atrisil ene ahisq munimuls art con

高校3年生です。 英語の参考書のルートについて質問したいです。 塾の先生からは 大岩のいちばんはじめの英文法 渡辺 肘井 の順でやれば重複になって定着するよと提案されました。ですが調べてみると渡辺は上下あったのですが、全部やるべきでしょうか？調べてみるとそのままネクステに進... 続きを読む

4行目の42パーセントがなぜ42になるのか分かりません。教えてください。

6 グラフと英文について問いに答えなさい。もの K There has been growth in the sales of computer and video game units in the United States for the past 12 years. Perhaps the largest growth was between [ ] and [ ], when the sales of computer and video game units increased about 42 percent. After 1998, there has been a steady increase in the sales except in ts sold than in []. In 2006, the US computer were fewer units [], when there were to and video game software sales grew six percent. none od oals U.S. Computer and Video Game DOLLAR Sales Growth orond noologa ORA 8.0 7.0 vien.n 7.0 -7.4 7.1 7.0 s or saoby 6.0 5.0 14.0 13.0 2.6-- 2.0 1.0 速読問題 43NTO 3.7. mouter and vi 4.8 computer STR. STEST 5.5-5.6... 6.1 【目標時間 5分 】 Talouno A-43 (関東学院大) (各4点) SMOO simsbine 320.0 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 0.0 .noitonitys asgougnal ) Jonitzs „299sugnal artito e Year oqe sdb 10 Ilse Tho bollbl ti jeste sdo tir 1. 本文の空所に入る年の最も適切な順番を示した組み合わせを1つ選びなさい。 idal ① 1996-1997-2004-2005 regorin 2 1996 - 1997 - 2005 - 2004 3 1997 - 1998 - 2004 - 2005 to nl241997 - 1998 - 2005 - 2004 gablesqa gnirlismoe orbi xim yam yod 10 mi 10 ogsugnal assinoloo 2. 本文の内容に一致するように、次の質問に対する最も適切な答えを1つ選びなさい。 no senso que parve pegeuren enorget to sum gels Sie wer From this article, how high would the bar for 2006 for the total number of W morb 100 98 10qa amepad slenIA video games be? Approximately the same height as 2005. 2 Shorter than 2005. 3 Taller than 2005. 033ghel to vio 4 tell. It is impossible to go this fod Bhixe ed or go sew tadi sesugn tell. a los ama zagsugnal sviten od on T srit ni nosloga asw dojdw.raimoƆ bollas syaugmel och tarb bisa quong 002 【2 スニング なさい。英文は2度読まれます。 Fived