写真の問題は、f(a)×f(0)をやる前に極値を持つことを増減表、もしくはf’(t)のDが0より大きいことを用いて示す必要ってないんですか？？

例題225 3本の接線が引けるための条件(2) 点P(a,b) から曲線 y=x2x に異なる3本の接線が引けるとき,点 P(α, b) の存在範囲を図示せよ. 考え方 曲線上の点(t, -2t) における接線の方程式に(a,b) を代入した3次方程式が,異 なる3つの実数解をもつための条件をα bに関する不等式で表す. |解答 y=x-2x より,y'=3x2-2 SA したがって, 曲線上の点(t, -2t) における接線の方程 式は、 y-(t³-2t)=(3t² − 2)(x −t) つまり, y=(3t2-2)x-2t3 この直線が点(a,b) を通るので, b=(3t²-2) a 2t³ ANAL り 2t3-3at2+2a+b=0 - b=0...... tの方程式①が異なる3つの実数解をもつような(a,b) ←話を変換する の条件を求める. f(t)=2t3-3at2+2a+6 とおくと, STARS f'(t)=6t2-6at=6t(t-a) INSC f'(t)=0 とすると, t=0, a したがって, ① が異なる3つの実数解をもつのは, y=f(t) のグラフがt軸と異なる3点で交わるときより, a≠0かつf(0)・f(a)<0 336E2 f(0) f(a)=(2a+b)(-a²+2a+b) <0より, |2a+b<0 [2a+b>0 1-a³+2a+b<0 [b>-2a つまり, b<a³-2a よって、求める領域は, 450 64 右の図の斜線部分で, 界線は含まない. または または Wa 業式 -a³+2a+b>0 [b<-2a b>a³-2a ba b=a³-2al Nau はグラフで考えよ √2 a b=-2a a>0 のとき ƒ(0)>0 A a a f(a)<0 a < 0 のとき f(a)>0 ! XC x f(0)<0 f(a) と f(0) が異符 号 2015 a=0のとき, f(0) f(a) ={f(0)}20 より, α = 0 は f(0) f(a)<0に含ま れている. 原点で接する.

Pencil-makers started calling the center of the pencil simply "lead, "which is the reason people still talk about pencil "lead"even thoug... Read More

ここは今、メアリーがウエイトレスとして働いているレストランだ。 This is the restaurant which Mary is working in as a waitress． なぜwhereでなくwhichが来るのか解説お願いします🙇🏻‍♀️

4番の書き直しの答え教えてください🙇‍♀️

He studied maps, made maps of his own voyages and of the voyages of others, and read books of travel. And always he said to himself: "There is an ocean east of China and an ocean west of Europe. Well, if the earth is round, it must be the same ocean that reaches from Europe around to China and laps the shores of both. And anyone can see that the earth is round if he watches how a ship sails out of sight on a clear day. Its hull disappears first, then the sails, till at last the very tip of the mast drops out of sight over the curve of the sea. If I could sail westward far enough, I know I should reach the eastern lands, and the great prob- lem would be solved." But Columbus had no way of proving his belief that he could get to the East by sailing (©). He was a poor man, and he had no money of his own with which he could buy ships, pay for supplies, and hire sailors to prove his kings and queens were rich () and powerful () in the belief. Only days to *fur- nish what he needed. For many long years (toto / helend / get / tried him/ships and sailors / one or another of the kings of Europe) with which to make the voyage. Of the great countries only France remained, and Columbus determined to go there. If the king of France failed him, no hope was left. *hull : 「船体」 *furnish: 「~を提供する」 C ships 1) 文中の空所ⓢⓔ (2ヵ所ある)に適語を1話ずつ補え, (各3) 2) 下線部の不定詞に用法の点で最も近い不定詞を含む文を次から1つ選び, 記号で答え £. (3) a b Cin It is difficult to finish it within a week. She was happy to receive. a love letter. You must work hard to master math. d She must be mad to say such a thing. 3) カッコ ⓘ が 「彼はヨーロッパの国王に誰かれとなく船と船員を貸してもらおうと努めま した」 という意味を表すように、 カッコ内の語句を並べ換えよ。 (6) 4) 下線部 ⑧ とほぼ同意になるように、次の書き出しに続けて英文を完成させよ。 (4) Columbus determined that ... 5) 本文の内容と一致するように,次の空所に適切な語を1話ずつ補え。 (各3) 7 Geography was among Columbus's ( ) studies. ). At the age of fourteen, Columbus became a ( The king of France was the (1) hope of Columbus. ( 12:10) を和訳せよ。 6) 下線部 how de P jole sicut to stay at badan dan undhe as.

これ至急教えてほしいです！よろしくお願いします

3 各組の英文が同じ状況を表す文になるように,空所を補い, 英文を完成させなさい。 (1) Harry said that he would stay there until the next day. Harry said, "( )( (2) Emi said to me, "I didn't eat breakfast this morning." Emi ( ) me that she ( ) ( Jexlporis ( (3) The waiter said to us, "Are you ready to order?" The waiter ( ) us ( ) ( sexlood (4) Karen said to me, "Who are you waiting for?" Karen ) me ( lood 997 (5) I didn't hear the news until quite recently. It ( ) ( JAR (6) She will come back soon. It ( ) ( poltida ert'nden beisool z'Yİ ( ) stay here until ($))." Dečaka ) ( over 06) ) breakfast ( besumm ) (ed. ) tasinovnos ( e) quite recently () I heard the news. ready to order. ) waiting for. 23210A3X- ) morning. eben abril CD (5) she comes back.HAR405 (1) sled kid

インターネット、マスメディア、メディア、ソーシャルメディアは何が違いますか?

英語の質問です。 並び替えの問題です。train had left the station I got toじゃだめですか？どうしてleftの後に目的語がないんですか？

016 After the [train had left I got to the station]. After sv, SV. 「svした後に SV する｣ の形 after には前置詞もありますが、 今回は語群 left や got から V が複数あるの で接続詞と判断します。 「電車が出発した (the train had left) 」 のは、「駅 に着いた (I got to the station)」よりも前のことです。 ちなみに had left の後にコンマはなくてもOKなんです。 和訳 電車が行ってしまってから私は駅に着いた。

教えてください

彼女は今ごろプ 23213895 3各組の英文が同じ状況を表す文になるように,空所を補い, 英文を完成させなさい。er player now. (1) Harry said that he would stay there until the next day. Harry said, "( )( ) stay here until (HE)." 364A48 (2) Emi said to me, "I didn't eat breakfast this morning." Emi ( ) me that she ( every lead time (3) The waiter said to us, "Are you ready to en ) us ( The waiter ( WEB 951 SUB (4) Karen said to me, "Who are you waiting for?" Hood ) (he Karen ( ) me ( ) ( berlooria order?" eady to order; ) ( ) ( en betrool ati ( . (5) I didn't hear the news until quite recently. It ( ) ( had to soo +過去分詞nakay.boi (6) She will come back soon. It ( 1991 ) ( in that area yesterday. sist ) (ed. ) breakfast ( 10159tib mlit 36dT OPPING) beaums ( -) ready to ready to order. ) waiting for. e) quite recently (V) I heard the news. Vista OS an ) morning. esw 9H order.a eB697 EbriT ebson sbni 1+when...) CD ) sin I (8) 2) (5) she comes back.**03 (1) -) Jasinsvnus ( -) el Istod einT

わからない問題をなくすといいと思う を英語で簡単に書いて欲しいです！

この空欄にcontinuesが入るのですが、 Butからの文の構造がよく分からないので 教えて欲しいです🙇‍♀️

The path of human aviation is uneven and dangerous But, from the ancient story of an English king killed in his attempt to fly with handmade wings to the launchings of rockets to the International Station, the desire for flight ( 1 ). Space