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Mathematics Senior High

数Ⅲ複素数平面の問題についてです。 字汚くてすいません (1)を青チャとは違う方法で解いたのですが、これではやはりnが最小値の自然数だとは決まりせんかね? よろしくお願いします

38 重要 例題18 累乗 要守 1+i ア=ーeとするとき 13+i B= V2 1+ a= 2 (1) a"=yとなるような最小の自然数nの値を求めよ。 )方程 のを求めよ。 n,mの」 式の形に直し,絶対値と偏角を比較 する。 程式が導かれるから,その自然数解について考えていくことになえ 答 1+ 1y=-aのとき 1- argy=argat 解答 ア=COS-ェ+isin 6' ー+isin-であるから, 7. 6 Tπ Aド·モアブルの限 (cos0+isinここ (1) α=cos+isin 7 -π十isin 6 nπ =COS nπ tisin 6 COS 6 =coS n0+isin 4偏角を比較。 a"=yより n=7+12k 7 -π+2kr (kは整数) nπ よって 6 6 n=7 求める最小の自然数nは, k=0 のときで π π (2) B=cos-+isin-であるから, α"B"=yより mT +isin COS 4 7 =cos-元+isin 4 7 Tπ 6 nπ mπ nπ COS 6 +isin- |(cosα+isin) ×(cosβ+isin =Cos(a+}+i 6 c+si(+)カーcos 5オ+ising よって(+=+2km (kは整数) m m 7 COS =D COS 6 -π十isin Tπ 6 m_7 4 4偏角を比較。 ゆえに 2n+3m=14+24k 1, mは自然数であるから, ① より のを変形すると 2と3は互いに素であるから, n-7=131, m-8k=21 (1は整数)と表される。よって n=7-31, m=21+8k nは自然数であるから 7-31>0 k20… 2(n-7)=-3(m-8k) 2 kS-1のとき 14+24k<0 ここで n+mが最小となるのは、 ②, ③からk=0 かつ!=2のとき a, bが互いに無 6の倍数ならば、 倍数である。 (a, b, cは整 n+m=(7-31)+(21+8k)=7+8k- ゆえに S2 すなわち(n, m)=(1, 4) のときである

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English Senior High

36,37,38の答えが分かりません。 どなたか教えていただけませんか?

asked strange questions so that the answers would sound funny and make them smile. that answer was true or not. Later in the interview, the volunteers were deliberately In the study, the scientists conducted interviews with volunteers. The volunteers recent study by scientists at the University of Portsmouth has shown that people can When people communicate face to face, they do not just communicate by speaking language. There are other factors involved, such as gestures. If the person you are tell if a speaker is smiling or not even without seeing their face but just by listening were asked to answer all questions with “I do in the summer,” regardless of whether talking to frowns, you know that he or she is unhappy. Whena person laughs during a conversation, you can tell that that person thought something was funny. However, a The interviews were videotaped with the purpose of gathering samples of different C 35) Smiling from Ear to Ear to their voice. of smiles. The scientists then analyzed the smiles. types According to the scientists, there are as many as 50 different kinds of smiles. T he researchers then had different group of volunteers listen to the audio portion of the recordings. This group of volunteers could tell what kind of smile the speaker had on his or her face by just hearing their voice. This indicated to the scientists that the voice has characteristics that communicate feelings and that people can interpret them. Another study also suggests that customer satisfaction is closely related to friendliness. As we all know, the best way to show friendliness is to smile. Researchers think that using the smiling voices in products or services effectively, Such as answering systems and computer programs, can contribute to better customer service. This can also be applied to hiring and training staff. Since people can tell ifa smile is real or not by a person's facial expression, and it has been proven that people, for example, customers can tell if a staff member's smile is real or not just by listening, then smiling not only from the bottom of your heart, but with your voice may be a g0od way to improve business.

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English Senior High

この教科書のレベルはどのくらいですか教えください この教科書でどのくらいのレベルの大学まで対応できますか?

1 On 10 February 2009, at a height of about 800 kilometers above Siberia, an American satellite collided the first such height [háit] satellite [séetalait] collide(d) [kaláid(id)] with an old Russian satellite. It was collision [kaligan] collision in the history of space development. As a result, fragment(s) [fráegmant(s)) debris [dabri:] more than 1,000 fragments of debris were scattered into space. 2 The image above shows the vast amount of space debris in orbit around Earth. Approximately 22,000 vast [váest] orbit [5:rbat] approximately [aprá:ksamatli) objects larger than 10 centimeters across are floating around Earth. Of these, about 16,000 are from known 10 considering [kansidarig) artificial [a:rtafijal] currently [ks:rantli] operation [a:paréifon] Considering that there are only about 1,000 artificial satellites currently in operation, the amount of Sources. space debris is astonishing. This space debris is not only due to the collision of satellites. For example, when rockets reach space, they s 15 leave behind surplus engines and fuel tanks. These objects remain in orbit as space debris. In addition, surplus s5:rplas] there are tools that astronauts have dropped while tool(s) [t:l(z)) astronaut(s) [astrand:t(s) aluminum [ala:manom per|par] working outside. Even a one-centimeter aluminum ball. when orbiting at a speed of around 10 kilometers per 0 bullet [bálat] second, is far more powerful than a bullet from a gun. gun [gán]

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Mathematics Senior High

数学A【一般の和事象の確率】サイコロ🎲 解法は理解できましたが、2個のサイコロというのは勝手に区別して良いのでしょうか?事象A∧Bにあるように(3.4)と(4.3)というのは同じではないでしょうか? 「大小2つのサイコロ」のように書かれていればこのようになることが分かります... Read More

○●|O O O PR 38 2個のさいころを同時に投げるとき, 出る目の最小値が3となるか,または, 出る目の最大艦が 4となる確率を求めよ。 目の出方は,全部で 6°=36 (通り) 出る目の最小値が3となる事象をA0 (G ) 出る目の最大値が4となる事象をBとする。 2個のさいころの出る目の数を,x, yとする。 事象 A が起こるのは,(x, y) が 更に(3,3), (3, 4), (3, 5), (3, 6), 口事象 A, Bは互いに排 反ではない。 ANB, すなわち出る目 の最小値が3で,かつ出 030 通り る目の最大値が4となる 場合が起こりうる。 1|2|3|4|5 6 のときで,その場合の数は 7通り 1 2 事象 Bが起こるのは,(x, y) が 23° 3 4 (4, 1),(4, 2), (4, 3) さ対回と 5 のときで,その場合の数は 事象 ANB が起こるのは,(x, y) が 7通り T0 回 ○はAの要素 はBの要素 ●は ANBの要素 2通り 8&ラ 大日) のときで,その場合の数は よって,求める確率 P(AUB)は P(AUB)=P(A)+P(B)-P(ANB) 2_12 36 7 1 回 戸7 36 準節ふ出 36 36 3

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