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English Senior High

英検準1級のライティングが毎回悪いです。 1回目 内容 3/4 、構成 1/4 、語い 3/4 、文法2/4 2回目 内容 1/4、構成1/4、語い3/4、文法3/4 こんな感じで毎回ライティングの点数が1番低いです。 2回で共通しているのは、構成が... Read More

Will Societies fature? with low birthrites face. Prents: Workforce, Foodshortige, Technological Innovation, Environment problem. I disagree with the idea. I have two reasons to my opinion. to get on important to First of all, it doesn't cause a foodshortage If the number of people increased, Some people who Live ChrA Parthe popularity decreased, it with bat country can't get the food enough. if food. That is Cause food problem. a Crisis in the not cause Płoblem Second of all,. it doesn't cause an environmental problem. These days, many trash is in ocean and on the ground. This kind of problem is Caused by the people decreased, the number of trash will inclined. foo Support In conducian, I think that low birth raten twon't food shortage and an enviroment a Is marraige becoming less important today than it was in the past ?! I agree with the idea. I have two reasons to support my opinion... university. ability of their studying, their much First of all, having children cost much money. It goes saying Therefore, to support their that these days many students parents must pay money. Secord of all, some women wants to live alone. (Vowadays, the number of women is who is working increasing. As a result, they can have enough money to live by themself so they don't think it is necessary to marry. increasing is is becoming less important. In conclusion, I think that their money problem and the number of people who want to be independent the problem that the marraige is

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Mathematics Senior High

②でなんで①みたいに範囲がX>0じゃないんですか?

基本例 例 次の方程式を解け。 (1) (logs.x2logsx=3 183 対数方程式の解法(2) 解答 (2) log2x+610gx2=5 指針 対数方程式には、基本例題 182 で扱ったタイプ以外に, (1) のような logax に関する2次方程式になる ものもある。 また, (2) の方程式を変形していくと, (1) と同様の2次方程式が導かれる。 なお, (2) では、底にも変数xがあるから, 真数>0だけでなく、 「底> 0, 底=1」 の 条件の確認も忘れずに! (1) 真数は正であるから x>0 ****** ① 方程式から (logax+1) (logsx-3)=0 よって logsx=-1,3 logsx-1から logsx=3から x=27 これらのxの値は ①を満たす。 x= ゆえに,解はx=1/13,27 (2) 真数は正で、 底は1でない正の数であるから 0<x<1,1<x ① ****** このとき、 方程式の両辺に logzx を掛けて (logzx)2 +6=5log2x (logsx)^2 -5log2x+6=0 (log2x-2) (log2x-3)=0 log2x=2,3 整理して ゆえに よって logsx=2 から x=4 10gzx=3から これらのxの値は ①を満たす。 ゆえに、 解は ****** B 00000 x=8 x=4,8 基本 182 演習 194 <log.x=t とおくと、方程 式は 1²-21-3=0 よって (t+1)(-3)-0 logsx-log 1/3 として x=1/13 とするか、または この問題では、底の条件 は真数の条件を満たす <x*1から log x+0 底の変換公式により loga2 logx2= logax logax よって logaxlog.2-1 Blogxx=t とおくと P-51+60 よって (12) (1-3)=0

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