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English Senior High

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Lesson 19 , od ne mi m om a get their support. 5 He himself was through far-reaching reforms. He abolished slavery, introduced a *bureaucracv and 298628 ig piaum. ofh al nao o litmo of the 2010s, donated about 90% of his salary to charities which helped poor people. The he was often described as the world's *humblest head of state. Not all leaders are like them. Unfortunately, some leaders only care about their statis 15 When their popularity declines, they often try to shift the criticism onto others so as to maintain their power. The class system during the Edo period aimed at dividing people into classes and giving them contentment by encouraging them to look down on the lower classes. Hitler managed to win people's support by setting *Jews up as their enemies. It is quite difficult to satisfy everybody and unite a nation. Nevertheless, good leaders smo ons Tanolaom nd listen to people's voices, including critical ones, to make better policies for the welfare of 20 naw asng-1agie all the people from the perspective of national interests. So when you are qualified to vote, collect as much information as possible about candidates and political parties. It will help Coo b you judge whether they are willing to create a better society or are just trying to ake 25 advantage of their status for their own benefits. Your single vote can make a big differèIto to our future. oiauM 9oitasrf o eysW ) 363 words

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English Senior High

赤い枠の単語を必要があれば品詞を変えて埋めるのですが、よく分からないので教えてください。

Vocabulary Practice A. Completion. Complete the paragraphs below using the correct form of the words in the box. One word is extra. hazardous discard pile substance notify infrastructure Reuse and recycle: these well-known ideas for dealing with trash are being employed to handle e-waste such as old computers, cell phones, and televisions. Many companies send used electronic items from the United States and the European Union to developing nations. They claim to be recycling, and also helping the developing world modernize its Customers shop for used televisions at a secondhand electronics market in Lagos, Nigeria. - However, the reality may be quite different. The Basel Action Network of Seattle, Washington, recently reported that three-quarters of the supposedly reusable electronics shipped to Lagos, Nigeria, are in fact broken. Consequently, 2.. roads. Often it's picked apart by the desperately poor, who come in contact with toxic 4. 5. Richard Guttierez of the Basel Action Nerwork believes companies in developed nations pay lip service' to recycling while actually disposing of their e-waste as cheaply as possible, leaving the developing world to deal with the problems it causes. of e-waste end up being 3.. - along rivers and -Such as lead-in the broken equipment. Lead is known to be especially to the health of growing children.

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Mathematics Senior High

2つの二次関数の大小関係について ・1枚目の画像の(2)において、なぜF(x)の最小値が出てくるのか ・1枚目の(2)の放物線と2枚目の画像の②の上に凸と下に凸はどこで判断しているのか が理解出来ないのでどなたか教えていただきたいです( ᵕ̩̩ㅅᵕ̩̩ )

|2つの2次関数f(x)=x°+2ax+25, g(x)=-x°+4ax-25 がある。次の条件が |成り立つような定数aの値の範囲を求めよ。 演習 例題 演習 例題129 2つの2次関数の大小関係(1) 201 OO すべての実数xに対して f(x)>g(x) が成り立つ。 )ある実数xに対してf(x)<g(x) が成り立つ。 ((1) 広島修道大) p.198 基本事項 2, 基本113 針> y=f(x), y=g(x) それぞれのグラフを考えるのでは なく,F(x)=f(x)-g(x) とし, f(x), g(x) の条件 をF(x)の条件におき換えて考える (b.198 参照)。 (1) すべての実数xに対して F(x) >0 (2) ある実数xに対して F(x)<0 となるaの値の範囲を求める。 (2f(2)-2cx1<0 ソ=F(x) y=F(x) x x 解答 5c2)79cs F(x)=2x°-2ax+50 プィス) 92)20 F(x)=f(x)-g(x)とすると 検討 1.「あるxについて●が成 a? )>o 2| り立つ」とは,●を満たすx a +50 が少なくとも1つある,とい うことである。 2.2次方程式 F(x)=0 の判 別式をDとすると, 2 (1) すべての実数xに対してf(x)>g(x) が成り立つことは, すべての実数 x に対して F(x)>0, すなわち [F(x)の最小値]>0が成り立つことと同じである。 =(-a-2-50=α-100 F(x) はx :=%で最小値 -+50 をとるから a° 2 (1) [F(x)の最小値]>0 の代わりに D<0 α° +50>0 2 (p.171 基本事項6利用。 常に F(x)>0=→D<0) (2) [F(x)の最小値]<0 よって (a+10)(a-10)<0 -10<a<10 (2) ある実数xに対してf(x)<g(x)が成り立つことは, ゆえに の代わりに D>0 (p.161 基本事項2利用。 y=F(x) のグラフの頂点 がx軸より下にある。) によって解くこともできる。 ある実数xに対して F(x)<0, すなわち[F(x) の最小値]<0 が成り立つことと同じである。 Iよって a? +50<0 2 ゆえに (a+10)(a-10)>0 a<-10, 10<a よって 章 2次関数の関連発展問題

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