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英語 高校生

To devastating effect のtoの働きを教えて欲しいです!

and amphibians, The RLI values show that all of these animal groups are dropping in number, with corals facíng the greatest danger of extinction.) increasing armounts of gas, Coal and other fossil fuels over the past 150 years, Humans are endangering species in a variety of ways) (By burning people have elevated the levcl of carbon dioxidol Their RLI values dropped from about 0.97 in 1996 to just above 0.8 in 2010,/ rincluding the following four major animal groups: corals, birds, mammals, already disappeared! The IUCN has gathered data on numerous species, 5回 英語(リーディング) S B You are stidying bow human beings are affecting the planét. You are going SV to read the following article「to understand the human impact pn world animal populations For centuries, humans have changed the environment around them through activities such as farming, fishing and cutting down trees. However, today they are changing the natural world at a faster rate than ever before to devastating effect, A report by the United Nations (UN) shows that up to one milion species of plants and animals are in danger of going extinct. The loss of these species will destroy entire ecosystems/ threatening_the continued existence of humans all over the world. 2 The UN report draws on data gathered by the International Union for Conservation of Nature (1UCN). The 1UCN created a Red List Index RLD that it uses to predict trends within different plant and animal groups. Croups with an RLI value of 1.0 are thOse that are not expected to become inct in the near future. Those with an RLI value of 0 are those that have a 3

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数学 高校生

(2)の赤線部分では、なぜk=4までしか代入していないのですか?

(ば虚数単位)とおく。 7 8(2) a=2tz+z"とするとき,α+α, aα および αを求めよ、ただし、α はaの失 +I SII 7 COS さい。 りla 1o0 (1)&+z+z+z'+z°+°を求めよ。 第1章 複素数平面 したがって 役複素数である。 a=z+z"+z=z°++ (: =2=, =(2)=z) )(1-2)(1-z")(1-2")(1-z')(1-2°)(1-z°)を求めよ となり,(1)の結果を用いて (千葉大) α+a=(z+z+z')+(z°++z)=-1 思考のひもとき また 1. 複素数2, wに対して ax=(z+z°+z')(2"+2°+2) =(z'+z+z)+(z°+z?+z)+(2?+2+z®) 2+w=z+w, zw=z·w 2 nが自然数のとき =(z+2++z++)+3=2 (": (1)の結果) そこで、解と保係数の関係を用いると、a, aは 解答 +t+2=0 ③ 2元 とおくと, 70=2r であるから,ド·モアプルの定理を用いると の2解である。 * 、ー 店井とは で判断る。 -1土7i t 3を解くと 27=(cos0+isin0)? 2 2kn +isin 7 2kn cos 70+i sin 70 ここで,2=cos (kは整数)だから 7 = cos 2π+isin 2π=1 2元 4元 + sin + sin 8元 Pe endanla=sin号+ +等一 an等+an等一皿号 (: 0<an号くn等, 等>) 2元 = sin 7 4元 + sin 7 . 2=1 … ① ここで,27-1=(z-1)(2°+k°+z'+z°+z°+z+1)であるから, ①より Tπ <sin 2℃ sin 7' 4T (2-1)(2+z+'t++z+1)=0 であるから 2π -1+7i 2元 +isin 7 -キ1であるから, ②より ス= COS α= 7 2 2+2+z'+z++z+1=0 (1-2)(1-2)(1-z')=1°-(z+ポ+2).1°+(++)-1-2 2+2++z++=-1 =-a+a (1-2)(1-2)(1-)=1°- (+z+2)·1°+(2+で+z)·1-2 -メ-ス (2) α=z+z+z'のとき α=z+z°+z =ーa+a =z+z}+2 (:: +z°+z"=z+2+z=d) =z+(z)+(z) であるから 22=|2P= cos°0+ sin°0=1であるから, ①より =-(α-a)=-(a+a}+4aa =ー(-1)°+4-2=7 27 1 2= 2 15

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英語 高校生

答えと解説お願いします。。。

学習日 7 Unique Houses Around the Worlc 世界中の珍しい家 1 There are many unique types of houses around the world. They are different depending on the climate, areas or the people's way of living. 2 Can you imagine a house you can move? You can see such houses in 'Mongolia. People living there have to move their houses when their animals have モンゴル finished eating the fresh grass in that area. So they live in a kind of tent which is 1) 5 Its *2framework is covered with a white *3 cotton cloth. They can 綿布 What a convenient easy to move. 骨組み easily fold and carry it when they move to a new place to live. 2) house they live in! 3 Some people live in floating houses on **the Amazon River. They are built of アマゾン川 10 wood and are tied to trees very near the river, só they' don't float away. Some are painted and others aren't. Why do they make such houses on the river? *5The height 土地の of the land above sea level is very low, and the land is sometimes under water. 海抜 Thereforè, ", it is dangerous to live on the land. 4 You can also see houses above the water in **Malaysia. Many people live in these houses built of strong wood to protect them from the sea water. Surprisingly, 15 the people make villages there and their houses have *7official addresses even thoug" they are not on land. 5 As you can see, there are many types of houses around the world. Someumo they may not look like homes. But they are truly people's homes! People m different types of houses because of different climates and ways of living. 1s 20 1 280 words safe way.

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