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数学 高校生

どうやったらこの式が出てきますか?? 教えてください🙇‍♀️

Action kt1 | 接線の方程式を y 切庁を や傾守 を用いて表す。 RI 2 |円の中心と1 の直線の距離を求める。 が 3 | 2 の距離と半径が等しいことから, ん や を求める。 失 () 求める接線の方程式を ッーー9%十ん …⑫ とおく。 の es 6 ② を変形すると 3z+ッー%三0 をHLで の A よって, 円①⑪ の中心C(一2 2) と直線 ⑫ の距離 ゐ は 4をてbnt 。 |3・(-の1・2一| _ 1%土全 才っ (計 Mg 710 に 直線 ④ は円 ① に接するから み=y10 4 =(OoWn |十4| 2 =/10 より ん e4|半10 KCDIGS 75 710 | MiEWIOIDSICU IO したがって, 求める接線の方程式は 9三ョ3%h0下2ーョJi 14 ②) 直線 x三2 は円① の接線ではないから, 接線の傾きを 。 <可点(⑫ 4 を通偶 名 とすると, その方程式は ッー4=z(z一2 寺 昌紀 すなわち がz一yー27z十4テ0 (6 S 円 ① の中心 C(一2, 2) と直線 ③ の距離 は <①,③ を連立きせ ニーに多圭2| 。」-4十2| る 2 次方程式の擬中! 265 7ーが ZZ十1 を利用 MT zz を求める解法も姓ん 直線③ は円 ① に接するから み=710 れるが計算が大変でめ ee 402。。 3 MPP |-4二2| = /10/記1 周辺を 2乗すると (4x+2%=100の1 ⑧ぁ(の=0 ょb 2 さ 9 したがって, 求め る接線の方程式は *二3ゅ14テ0 DOESDESID 4

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英語 高校生

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TPidgim Emgish Wiar happcms win people necd to communicate but have no cemmon angnagef Youmay ja aken par in coavertions sak as tBiS er perhaps youve witmeswed on fmm a ore comfortablc distance. They gesturc. they talk with their hands and feet. and 一 somewhat surprisingly 一 they speak. as well. That is surprising becasse they really cannot hope tbat amyopc w山 undcrstand much morc than their moodLif hr or she camt undcrstand thr languagr_ But they go ahead and speak anyway. and we can understand bits and pieces of what they say by paying clow attcnGon to thc rrst of the communicstem A がggiz is a simplihied form of language dcvclopcd by speakkcrs who otherwise share no omon languamw This means oi course that pidgins begin in mmultiingual* stuations 一 where ai least two. and more likcly seweral languagcs cocxist. ( ) ). pidgins spring up in rading rmters or in areas umdcr industriabzation (including agricultursl industmahzation. tbat plantanion) They develop bere because the opportuniies for trade and work attractlarge mambers or people with diEernt native tongues Thc term pidgin dcvlopcd from apidgin pronumciatiop of busness: busncss Engish became pidgin English・ A pidgin in the technical snsc is a sort oflanguage scrving the meeds of a community. Thus a pidgn is not simply thc brokcn Engiish of a waiter in a ipreign restaurant (who spcaks his native language with his co-worikers). por is it an idiots verson ofa language. or a kind of inevitable deterioration* in tbe bands of barbarians*。 ( づ )。 robably the morc intelieeat and ambidoms people in s culpure who master the cpcrsy and couragw needed for the move to an industrial or market amea Somc pcopks gcl that pidgins smc wag becatsc cf the Best snd os way they py with hc structural patterns of their basc language。 In a scnsr.the charge is correct pidgins have no respect for the grammars of tbeir base angrages But 下i doesnt make pidgins wrong since he radical simphification we find in pidgins servcs a worthwisls gpal- communicahon。 Because ofits simple structure a pidgin is easier to learn than other languagcs_ By providing a means of communication in a community. it fac抽tates tbe integration* of newcomers who would have a much more dificult time larning a standard Europcan language_ Tinaly. mdgins rc a reahty whosc cxistcpce is pot bject to dkbate。 Tbcr re dozeps of dgins. many of which show no signs of dying out Since tey arisc sponiapeously wherever people need to talk. pidgins probably represcnt the primative communication system out of which our more respected modern languages dcveloped。 This fact alonc makes them wel orth our attenton aped tom umeaer rax 3 cawos pe 23rの4 ne Os Se tee Dame e Leezaet ras ea PT ーッー

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