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数学 大学生・専門学校生・社会人

青のところまでは分かるのですが、その後のAの指数m-1とa1 (この1ってところが分からない)の関係性を教えて欲しいです。スタートがAmではなくてAm-1だったらm-1の時にa0が対応するのは分かるのですが、その理由がわかりません。

① このファイルにはアクセス許可が制限されています。 部の機能にアクセスできない可能性があります。 - アクセス許可の表示 × m を0以上の整数とする。 10m 秒の時点で A,Bを訪れているユーザー数を am人, bm人 とする。そうすると調査結果から, 時刻に伴って変化する数列{am}と{bm}ができて,a=100, bo = 200および, Jam+1=0.9am+0.26m lbm+1=0.1am+0.8bm を満たす。これは一種の漸化式であるが, 2つの数列をまたがって表現されたもので 連立 漸化式といわれる。 その形は連立1次方程式と似ている。 そのため行列を用いて, (am+1) = (0.9 0:2) (bm) 0.2/am 0.8 0.9 0.2\ と表せる。ここで, A= 0.1 とおくと, 10m 秒後の人数の分布は, 0.8. ram² am-2 = A =A A =A2 (am-2) m m-1 かる! ao Am (61) = Am (60) = 4 (200) " で計算することができる。 最後の式には, Am乗が登場している。そこで続いて, 行列のべき 乗を考えてみよう。 bm-21 \bm-2 = Am-1 == 注意.上の行列4は行ベクトルの和が, (0.9 8,2) (0.1 0.8) 15 13 と、すべての成分が1の行ベクトルになる。このような、行ベクトルの和が1だけの行ベク トルとなる行列を確率行列という。確率行列は、分布状態の変化を表すときなどに現れる重 要な行列である。 2.2.2 行列のべき乗 すでに私たちは、 対角行列のべき乗が簡単に求められることを25ページで学んでいるの で,この考え方をもとに行列のべき乗を求めることを考える。 O Mi +

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TOEIC・英語 大学生・専門学校生・社会人

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5 A Matter of Taste Reading Passage 042 At the age of just 22, Jamie Oliver became well known across the UK as "The Naked Chef." He called himself this not because he cooked wearing no clothes, but because he wanted to simplify food preparation so that everybody could follow his recipes. He wanted to "strip down" the idea of cooking. Since then he has had numerous TV shows, published 50 many books, and has become a household name in the UK. Today, one of the activities Jamie Oliver is best known for is his great effort to improve the school dinners that children eat every day. One day, he visited the kitchen of a typical London secondary school, and he was shocked to see how much processed junk food the kids were given to eat each day. Fat and sugar levels were extremely high, and nutritional values very 10 low. The "turkey twizzler" became the symbol of these unhealthy meals: processed meat containing 21.2% fat and only 34% actual turkey. Oliver ran the school kitchen for one year and tried to show that it was possible to serve healthy meals on a limited budget—and that kids actually enjoyed eating them. His mission was to radically change the eating habits of children in that school, and across the country. 150 200 15 20 25 CULTIES 250 His project (the "Feed Me Better" campaign) has had some influence on school dinners in the UK. After watching the documentary Jamie's School Dinners, 271,677 people signed a petition calling for healthier school meals. This led the Prime Minister to agree to spend 280 million pounds (about 37 billion yen) on school dinners, to ban some junk food from school menus, and to create a School Food Trust to provide support and advice for people preparing school meals. Research, by the way, shows that children who stop eating sugary, fatty food and instead eat Oliver's school dinners are better behaved in class, and they get higher test 300 scores, too. 350 Of course, the project has had some problems. At first, many students (and even parents) resisted the removal of the junk food they were so used to. In one famous instance, some parents were passing local takeaway food to their children through the school fence. Also, schools that followed the plan for a while were often found to gradually drift back into bad habits. After all, it is easier and cheaper to just give the kids junk food. However, Oliver's efforts represent a positive start, and with obesity becoming such a huge problem (see Unit 4), 400 it's a very necessary start.

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TOEIC・英語 大学生・専門学校生・社会人

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