2019年度の都立の過去問です。 (1)(2)どちらも答えていただけると嬉しいです！ お願いします!!

火の合問ー谷えよ。 [先生が示した問題] aを正の数,nを2以上の自然数とする。 石の図1で、四角形ABCD は, 1辺acmの正方形であり,点Pは, 四角形 ABCD の2つの対角線の交点である。 「辺a cm の正方形を,次の[きまり]に従って, 順にいくつか重ねて- できる図形の周りの長さについて考える。 [きまり] 次のの~3を全て満たすように正方形を重ねる。 の重ねる正方形の頂点の1つを,重ねられる正方形の対角線の交点に一致させる。 重ねる正方形の対角線の交点を,重ねられる正方形の頂点の1つに一致させる。 対角線の交点は,互いに一致せず, 全て1つの直線上に並ぶようにする。 右 答B 形の Todayehay nt Pesuval ot the sevenih fooS nd 。8 He star の月 (問2 2 3 ヨen THAs (a 3 ns jo spu 30 HBO bep 図3 vOL 正方形を順に重ねてできる図形の周りの長さは,図2 右の図に示す太線(一)の部分とし,点線(…)の部 分は含まないものとする。例えば右の図2は, 2 | 図4 1個目。 (F XO hol@ 個の正方形を重ねてできた図形であり、周りの長。 さは6acmとなる。右の図3は,3個の正方形を othM counくe 重ねてできた図形であり, 周りの長さは8acmとお率節ささこ の焼る なる。の美文と質問 右の図4は,正方形をn個目まで順に重ねてで に答えなさい 2個目 同 ; 3個目く デ 学 までする中 n個目 きた図形を表している。 1辺acm の正方形をn個目まで順に重ねてできた図形の周りの長さをLcmとするとき。 Lをa, nを用いて表しなさい。 い当館 S図O る 0円 (OG

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Do you like dogss OU He dogs7 People ay tha dogs ae me oldew fiends orhumans Some 所 Te Vi People as Pets o tnlk about some Dogs we led by many peopls。 Now Tm gomg kinds of dogs w 「 Tes Working fordiabled peopkk。 They are not pes。 Toy are saiiance dogE 1p Japan。 there are three kinds of assistanee dogs。 They are gnide dogs。 service doB3 and Teng dogy Tody。 jn Japan。 more tan a momsand ssshtance dogs work for diabled PeoPIe To of thom are guide dogs。 The mumber of senrice dogs and hearing dogs is mot So large 人 OF Mey 1 2017。 here were onby abowe seveny senoe dogs mm Japan。 The number of hearing dogs was about he same. Guide dogs work for peopls who cannot see。 Guide dogs lead thc users when hy 8O 9 Herent places。 The dogs walk with the uscrs and gnuide them im a sefc way。 For Purposc。 guide dogs are ( A ) to go stmight along the road。 The users know hhe situaon j front of them thanks to the dogs、 and give dmectoons to the dogsy such as Wai FComer md “Sright go.” We can say that a gnide dog and the user work together to walk safely。 Service dogs work for people who cannot use their ams or legs ficcly。 Scrvice dogs do a Jot of things in daily lives for such people. For example。 they pick up things on the floor opcn. and close doors, and bring things from other places。 When something dangerous happens。 the dog can even run to some other people and ask thcm for hclp。 We can say that service dogs [で①語 Hearing dogs work for pcople who cannot hear。 Haring dogs can understand many kinds or sounds。 such as phones alanm clocksr cping babics nd so on。 The dogs 【 by /tel/ is heard / usi ig / thc users / their / what sound 】bodies: ER lece。 the dogs ouch the users and lead them to the place。 Hearing dogs can tcll many kinds of sonnds to the users and help them The law about assistance dogs says that they can go with the users imto many places Hike Testanrants, supenmarkets, and so on. So you have many chances to see thcm。 But you should amember one important thing about them。 Assiance dogs are not pets。 They are working 5r the users. so you must not talk to them or touch them。 OF course you must not give them ay food. Asshtance dogs md the usems respect eech othier ss Partnets。 When you meet an ssistance dog and te uscr in town。 just see what they dO。 TF they need some help。 lers ghve them a hand.

お願いします

Do you like dogss OU He dogs7 People ay tha dogs ae me oldew fiends orhumans Some 所 Te Vi People as Pets o tnlk about some Dogs we led by many peopls。 Now Tm gomg kinds of dogs w 「 Tes Working fordiabled peopkk。 They are not pes。 Toy are saiiance dogE 1p Japan。 there are three kinds of assistanee dogs。 They are gnide dogs。 service doB3 and Teng dogy Tody。 jn Japan。 more tan a momsand ssshtance dogs work for diabled PeoPIe To of thom are guide dogs。 The mumber of senrice dogs and hearing dogs is mot So large 人 OF Mey 1 2017。 here were onby abowe seveny senoe dogs mm Japan。 The number of hearing dogs was about he same. Guide dogs work for peopls who cannot see。 Guide dogs lead thc users when hy 8O 9 Herent places。 The dogs walk with the uscrs and gnuide them im a sefc way。 For Purposc。 guide dogs are ( A ) to go stmight along the road。 The users know hhe situaon j front of them thanks to the dogs、 and give dmectoons to the dogsy such as Wai FComer md “Sright go.” We can say that a gnide dog and the user work together to walk safely。 Service dogs work for people who cannot use their ams or legs ficcly。 Scrvice dogs do a Jot of things in daily lives for such people. For example。 they pick up things on the floor opcn. and close doors, and bring things from other places。 When something dangerous happens。 the dog can even run to some other people and ask thcm for hclp。 We can say that service dogs [で①語 Hearing dogs work for pcople who cannot hear。 Haring dogs can understand many kinds or sounds。 such as phones alanm clocksr cping babics nd so on。 The dogs 【 by /tel/ is heard / usi ig / thc users / their / what sound 】bodies: ER lece。 the dogs ouch the users and lead them to the place。 Hearing dogs can tcll many kinds of sonnds to the users and help them The law about assistance dogs says that they can go with the users imto many places Hike Testanrants, supenmarkets, and so on. So you have many chances to see thcm。 But you should amember one important thing about them。 Assiance dogs are not pets。 They are working 5r the users. so you must not talk to them or touch them。 OF course you must not give them ay food. Asshtance dogs md the usems respect eech othier ss Partnets。 When you meet an ssistance dog and te uscr in town。 just see what they dO。 TF they need some help。 lers ghve them a hand.

分からないので教えてください。

この問題がわかりません。教えてください！m(_ _)m一次方程式です。出来れば手書きでお願いします！手書きじゃなくてもいいです。

やっと出来た

③の式から④の式になるのを教えてください。