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• Chart Equation Mathematics 1 Part1 [Equations and Inetheles]    Toshikazu Sunada (Written by) Zuken Publishing Co., Ltd. (Publishing House) 2003April 1, 2016 (Release date) Hardcover (Format) Good、I'm going to start this collection of questions today~。 Let's start with Chapter 1, "Equations and Inequalities"。 Question 1、It is said that it is a problem of Doshisha Women's University。 This is just a matter of expanding the expression。 It's a hassle to calculate.。 \({ x }^{ 5 }\)The coefficient of is (-19\)、\({ x }^{ 3 }\)The coefficient of is (-23\)だろう。 ほい、正解～。 According to the commentary、全部を展開しなくてもその次数の項にだけ注目すればいいみたい、I see。 次は第2問。 同志社大の問題だ。 (1)は条件式から $$xyz=3\left( xy+yz+xz \right)\tag{1} $$ となり、あとは普通に与えられた式を展開して(1)式を代入すれば、都合よく\(\left( xy+yz+xz \right)\)section disappears and the answer comes out。 (2)According to the hint、 $${ x }^{ 3 }+{ y }^{ 3 }+{ z }^{ 3 }-3xyz=left( x+y+z right) \left( { x }^{ 2 }+{ y }^{ 2 }+{ z }^{ 2 }-xy-yz-zx right) $$ It seems to use the formula that。 If we transform this equation into、 $${ x }^{ 3 }+{ y }^{ 3 }+{ z }^{ 3 }={ \left( x+y+z right) }^{ 3 }-3\left( x+y+z right) \left( xy+yz+zx \right) +3xyz $$ このようになって、The rest(1)と同様に式を代入すれば\({ x }^{ 3…
• Beware of the Red Hood Revised 庄司 薫 (Written by) Chūō Kōron Shinsha (Publishing House) / 中公文庫 1995年11月18日 (Release date) Kindle version (Format) 青春文学だという。 僕はこの小説を寡聞にして知らなかったのだが、どことなくJ.D.サリンジャーの「ライ麦畑でつかまえて」を彷彿とさせるなぁと思った。 主人公の語り口調がなんかホールデンっぽかった。 ストーリーは都立日比谷高校に通う高校3年生の主人公の1日を描いているのかな。 主人公はいろいろと思い悩むが、最後に自分のなりたい理想像を見つける。 According to the afterword、日比谷高校は毎年200名近い東大入学者を出していたかなりすごい高校だったみたい。 エリート校の、受験競争になんて興味ありませんというキザなインチキ芝居についての描写はおもしろかった。 そこには美学が感じられる。 伝統校はこういうところがあったりするのかもしれない。 受験と関係ない遊びとか部活とか文化祭とかの行事にものすごく力を入れたりするもんな。 However,、学生運動の影響でその年の東大入試が中止になり、主人公は大学受験をやめ、来年また東大を受けようと決める。 大変な時代だったんだなぁ。 当時の時代を鮮やかに表した小説なのだろうか。 Also、この小説は1作目で続きがあって「薫くん四部作」というものがあるらしい。 まだまだ僕の知らない小説は多い…
• I don't hold a grudge against spring Natsuki Ikezawa Chuo Kōron Shinsha / Zhongkong Bunko, January 2016 (Release date) Bunko (Form of issuance) I have never visited a disaster-stricken area.。 I want to visit in the future。 This book is devoted to all of the author's ability to ponder the Great East Japan Earthquake.、It is a book that captures the reality of the earthquake disaster from multiple perspectives.。 Easy to read and understand。 It's a recommended book。 Feel the quiet anger of the author。 Was it a total confession?。 7章表題 昔、原発というものがあった （p.78） 言わずもがなだ。 Isn't the country that suffered atomic bombings exposed to the atomic bomb again?。 A demagogue called a radiant brain roamed the net。 The mothers bought the Geiger counter.。 Are there any health hazards for children?。 I want to eat sushi from Sanriku。 There is a tragedy of Okawa Elementary School in Miyagi Prefecture。 昔読んだ本に詳しかった。 When the tsunami came, they gathered in the schoolyard to evacuate, but it took a long time to be attacked.。 I was reminded of the all-school assembly when I was in elementary school.。 Once gathered in the gymnasium, the teachers try to educate the students。 Children are happy to chat when they come to an extraordinary space。 But the kids noticed.。 Teachers' eyes。 Teachers silently stare at students。 Children Shut Up。 Teachers pick up microphones and start talking。 You guys took 14 minutes to get quiet。 Think about what the all-school assembly is for.。 Don't take this long, and so on.。 How was the incident at Okawa Elementary School?。 I think it's a very tragic incident.。 There are no words about sadness。 Didn't the teachers downplay the disaster for educational purposes?。 Let's educate and learn students as usual.。 I wish I had evacuated sooner。 It took teachers an hour to make a decision。 Think about what the evacuation is for。 It should not take long。 In the Great Tohoku Earthquake, the existence of stone monuments was also greatly captured.。 Below that of the Jokan earthquake is a stone monument of lessons that were considered dangerous.。 But modern people didn't realize it.。 How far should I escape?。 What height should I go to be safe?。 The stone monument told me that very well.。 There is a stone monument called Koshinzuka。 In the tradition that the three-pointed insect reports evil deeds to the gods.、Derived from the habit of staying up until midnight to prevent it。 It is assumed that this became a form of exorcism in conjunction with the pest control method of agricultural crops.。 I wonder how many people see a stone monument and imagine it.。 There is also a stone monument called Dosojin.。 It has the meaning of placing it in the town to prevent the invasion of evil gods。 21Aren't we living in the century fully aware of it?。 In the wake of the earthquake, a new tsunami stone monument was erected.。 It's a hieroglyph from the Tohoku people.。