Grade

Type of questions

Mathematics Senior High

(2)の解説お願いします。

52 00000 不等式が常に成り立つ条件 (絶対不等式) 0 基本例題 91 〔東京電機大] (1) すべての実数xについて, 不等式 x2ax+2a> 0 が成り立つように、 定数aの値の範囲を定めよ。 p.14 基本事項 (2) すべての実数xに対して, 不等式 kx2+(k+1)x+k ≦0 が成り立つよう な定数kの値の範囲を求めよ。 CHART & SOLUTION 定符号の2次式 常に ax2+bx+c>0⇔a> 0, D < 0 常に ax²+bx+c≦0 a<0, D≦0 (1) x2の係数は1>0 → D<0であるαの条件を求める。 (2) 単に「不等式」とあるから,k=0 の場合(2次不等式でない場合)も考えることに注意。 k0 の場合、 < 0 かつ D≦0 であるんの条件を求める。 解答 (1) x²-ax+2a=0 の判別式をDとする。 x2の係数は正であるから、常に不等式が成り立つ条件は D<0 ここで D=(-α)²-4・1・2a=a²-8a=a(a−8) D< 0 から 求めるαの値の範囲は (2) kx2+(k+1)x+k≦0: ① とする。 [1] k=0 のとき, ① は x≤0 これはすべての実数xに対しては成り立たない。 [2] k≠0 のとき, 2次方程式 kx2+(k+1)x+k=0 の判 別式をDとすると, すべての実数x に対して, ① が成 り立つための条件は ん < 0 かつ D≦0 ここで D=(k+1)²-4・k・k=-3k2+2k +1 D≦0から よって -(3k+1)(k-1) (3k+1)(k-1)≧0 1≤k == k≦- 0<a<8 243h 3' <0 との共通範囲をとると ks--1/32 以上から 求めるんの値の範囲は R≤ - 1²/13 下に凸の放物線が常に x軸より上側にあるた めの条件と同じ(p.14 基本事項 2 参照)。 ( 下に凸 D<0 FRER > (2) [2] 上に凸の放物線 x軸と共有点をもたら い,または,x軸と接す ある条件と同じ。 [2] I 上に凸 D≤0

Solved Answers: 1
English Senior High

214の回答がDになる理由がわかりません。 製品の安定需要という内容はどこから読み取れるのか教えてください

Samuels LAX, announced on Movey that it will spend $1 billion to build nylon production and processing facilities in Singapore to serve the Asia Pacific region. Construction of the 45,000-square- meter plant will take two years. When the factory is complete, it will employ over 500 workers and have an estimated annual production of 60,000 tons of nylon and nylon components. According to company spokesperson Michael Tan, the plant will be equipped with the same advanced technology used in Samuels plants in India and Canada, enabling the company to price its nylon competitively. The nylon products will be sold to 213. What is the purpose of the article? (A) To publicize new merchandise (B) To discuss a company's plans for expansion (C) To explain a problem with a product (D) To describe the layout of a factory 4 Part Part applications. companies throughout the region for use in various industrial textile The Asia Pacific market for nylon has remained strong over the last decade, with the majority of purchases coming from the automobile manufacturers, Samuels is hoping that the efficient production from the new factory will position it to become a leader in the market. It will face stiff competition from Haring Corporation, the current leader, and from several other large chemical companies that ship nylon products into the area from Europe and Africa. 214. According to the article, why did Samuels Ltd., choose to target the Asia Pacific market? (A) It can ship in products from its existing plants. (B) There is no competition in the region. (C) Raw materials are available locally. (D) There is a steady demand for the product.

Solved Answers: 1
English Senior High

解答がないので解答だけでいいので教えて欲しいです!

2 2) 3) (NS 次の 味になるように( )内に適語を入れなさい。 Friendship is the most important thing in life. ) is ( ) is ( ) as friendship in life. ) than friendship in life. This painting is the oldest of all in the museum. This painting is ( d) than any ( AT) painting in the museum. ) other () in the museum is as (1) (+) this. Picasso is the greatest artist that ever lived in France. Picasso is ( ) artist as ever lived in France. 次の各文の( )内から適当なものを選びなさい. 1) Mr. Carter is junior (than, to) my father. 2) The (cleverer, cleverest) man sometimes makes a mistake. 3) Cathy looked (sadder, more sad) than angry. orada 4) The typhoon will be (most violent, the most violent) about noon. Tellob Of 5) I (like, prefer) coffee to tea for breakfast. B sebit voblos bas tables aning il him hi qo'tgow Digid TE ellu eid 10 1911 sdi Ils mid salil E Pond sm bisq mill east on load sm binq mil ton bad om bisq mil 次の日本文の意味を表すように( )内の語句を並べかえなさい. jon d em bisq mi 1) ブラジルはラテンアメリカでずばぬけて大きな国です。 ¹970m on ai sladw SVS Brazil is (largest/far/in/by/country/ the) Latin America, eesl on ei sladw 2) 地球温暖化は私たちが今日直面している最も深刻な問題の1つである。 +bra+ Global warming is (the most / problems / of / serious / one) we face today. 3)旧友からの手紙ほどうれしいものはない. Lot Car Wall face P12204 SH+er ([l-eeussed]... 10t++ort II (me/than / nothing / happier / makes) letters from old friends. Her anon) 4) ジョンはチームのどの選手にも劣らずシュートが上手だ. Ils 701 19sios adi egon si adol John is as (shooting / good/player/as / at / any) in the team. 5) エリはイヌの世話をすることがほかの何よりも好きだoneiA). de nardiaram on siom a Eri likes (than / else / looking after / better / anything/her dog). I

Solved Answers: 1