青で囲った部分がなぜそうなるのか分かりません💦

ベクトル方程式が表す図形とその面積 TO 平面上に一直線上にない3点 0, A,Bがあり, a = 0, -OB とおく。 143,161=2+6=4 とする。 以下、比の形で解答する場合,最も簡単な自然数の比で答えよ。 MJA (1) 内積の値は,a. 直線ABと の交点 また、△OAB の面積Sは, S OC 解答 Key 1 > Key 2 (2) OP=1 として、点Pが関係式 = sa+tb,4s + 3t ≦ 6s ≧0,b≧0 を満たしながら動く。 ケ a, OD = サ 6 とおくとき, 点Pは△OCD の周および内部にあるから, LA TABLE 点Pの存在する領域の面積は である。 1 (3) OQ = 1 として,点Qが関係式 130-24-663 を満たしながら動く。 as s このとき、点Qは線分ABをタチに内分する点Eを中心とする, 半径 = lal= 13+2a6=16 より (1) [a+b| 4の両辺を2乗して FARE であるから, 線分ABの長さは, AB = オ ク |a|2+2a6+|6|2 = 16 より =3|6| = 2 を代入して = カキ] また, シスセ 攻略のカギ! Kev = ゆえに AB²= AB > 0 であるから AB=√10 +1, 2+ である。 = 3 2 TRA to 2+3 3&+ds) (3) 139-2a-6 ≤la-6 kb/ |BA| √10 3 3 F(d, To (2) p = sa+tb, 4s +3t ≦ 6s ≧0, t≧0より 2s t Q2s ≦ 1, ≥ 0, JUST 301 GA (S) LUETA b = ²25 ( 22 a) + 2/2 (26), =(1/2)+1/1/26(20)+1/12/21.000 ) 3 3 D また, △OAB の面積Sは s = √|a1²161² - (a + b)² = 14 DE 34/15 12 X 2 XS = 3S = A (49/15 4 la-bl 3 2a+b OE = とおくと |OQ-OE| ≤ √10 3 3 ゆえに,点Qは, 線分ABを1:2に内分する点 √10 Eを中心とする, 半径 の円の周および内部を動く。 3 -2+30 2 |AB|2 = 16-al² = |a|2-2a・6+|6|°= 10 + JAPである。 3 A 2 3 よって,OC=a, OD = 26 とおくと, 点Pは∠OCD の間および 2 内部を動く。 d また、その面積は MA+ 2a + b làm là đi |à-b| 3 3 である。 ウエである。 上に 20 200 6 2008/0 B 0 ②② B A ツテ の円の周および内部を動く。 ト MISH (STRAD -DA KA MASA ART) - RE = JA E 48 +3t6 の両辺を6で割る と 2s t + ≤1 3 2 2 AB C MAMA JA 10 る。 2s よって2/12/3を係数とす (1) b= +55 +0² OP = SOA + top, stt1, ≧0, t≧0 は, △OAB の周および内部とせよ 3点O,A,Bが一直線上にないとき, OP = SOA + tOB について (ア) s+t=1 を満たすとき, 点Pは直線AB上を動く。 (イ) s+t = 1,s ≧0, t≧0 を満たすとき, 点Pは線分AB上を動く。 = DA A ATRA |EQ| ≤ √10 (ウ) st≦1,≧ 0, t≧0 を満たすとき, 点Pは△OAB の周および内部を動く。 Ke 2|OP - OC|=r を満たす点Pは,中心C, 半径rの円周上を動くとせよ |OP − OC| = r⇒ |CP| =r=[@E$5/B=4S 1 ST19 SANOKIMI # WB② AROUDS | D 7章 ベクトル

画像下線部のカンマがついている理由がわかりません。

次の英文の下線部を訳しなさい It was at lunch on a cold Sunday in late January that we first heard the noise. It sounded like a tapping; slightly metallic Reluctant to leave the table, at first we speculated on the possibilities. But when the tapping became persistent, or rather insistent, we went to investigate. And so we came upon the blackbird, pecking at the window. (法政大)

私はいまニュージーランドに留学している今年度上智大学を受験予定の高校2年生です。上智大学の経営学科の帰国生入試には和訳問題があるのですが、どれも自分には難しく、現地の先生にアドバイスしていただいてもいまいちわかりません。どなたか、回答を教えていただければと思います。 下線... 続きを読む

Why - and why now? Because of the shift in the Experience Economy. Goods and services are no longer enough; what consumer want today are experience - memorable events that engage them in an inherently personal way. As paid-for experiences proliferate, people now decide where and when to spend their money and time - the currency of experiences - as much if not more than they deliberate on what and how to buy (the purview of goods and services). (1) But in a world increasingly filled with deliberately and sensationally staged experiences - an increasingly unreal world - consumers choose to buy or not buy based on how real they perceive an offering to be. Business today, therefore, is all about being real. Original. Genuine. Sincere. Authentic. In any industry where experiences come to the fore, issues of authenticity follow closely behind. Think of Disneyland. No place before or since its opening in 1955 has provoked more debate on authenticity within modern culture, nor has any other business sparked more controversy on the effect of commercial activity on the reality of modern living than the Walt Disney Company. (2) Or think coffee. Starbucks earns several dollars for every cup of coffee, over and above the few cents the beans are worth, precisely because it has learned to stage a distinctive coffee-drinking experience centered on the ambience of each place and the theatre of making each cup. Perhaps no other company in the world more earnestly and steadfastly seeks to render authenticity ー resolutely shaping how real consumers perceive it to be. The task has become harder and harder, however, as Starbucks has grown from one shop in Seattle to over 13,000 venues around the world, for nothing kills authenticity like ubiquity. The success of Starbucks no longer depends on its operational prowess or taste superiority; it lies solely in sustaining coffee drinkers' perception of the Starbucks experience as authentic. (3) Now that the Experience Economy has reached full flower - supplanting the Service Economy as it had in turn overtaken the Industrial Economy, which itself had replace the Agrarian Economy - such issues of authenticity now bear down on not only all experience offerings but across all of the economyY.

10と11の答えを至急お願いします😭

9. Arecent earthquakce measured 6.8 on the Richter scale- How many mmes mnore intense was this earthquake than an earthquake thatmeasured 生3.on the Richter Scale? と BS /タ はを 1 / イン 2 c (3 7の クンァ 10.Find the concentration of hydrogen ions, [HH], for vinegar wiFh ap持=3.L 3 ッイ 2 ブ 6 ア MA! = 0 .ら5 11.Soft-recorded music is about 4000 tmes the minimmum intensity of sound detectable by the human ear. Find the joudness in deabels. スクの 12J Eariy in the centry an earthguake measured 8.0 on the Richter scale. In the same year, another earthquake Was recorded that measured six me SCoRger on the Richter scale- What was the magnitude of the earthquake Of the sronger

10と11の答えを至急お願いします😭

9. Arecent earthquakce measured 6.8 on the Richter scale- How many mmes mnore intense was this earthquake than an earthquake thatmeasured 生3.on the Richter Scale? と BS /タ はを 1 / イン 2 c (3 7の クンァ 10.Find the concentration of hydrogen ions, [HH], for vinegar wiFh ap持=3.L 3 ッイ 2 ブ 6 ア MA! = 0 .ら5 11.Soft-recorded music is about 4000 tmes the minimmum intensity of sound detectable by the human ear. Find the joudness in deabels. スクの 12J Eariy in the centry an earthguake measured 8.0 on the Richter scale. In the same year, another earthquake Was recorded that measured six me SCoRger on the Richter scale- What was the magnitude of the earthquake Of the sronger

この問題解いてください

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誰かお願いします！途中もあってるか、間違ってるか分かりません…

ベクトルの問題です どなたか教えてください(´・ω・`)