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Mathematics Senior High

黄色チャートからの出題です。 一枚目答えより、最終の式ではなぜ-2と+2をしているのでしょうか?

PR @11 150以下の正の整数全体の集合 (150, 149, 2,1}で3の倍数からなる部分集合をX,4 の倍数からなる部分集合をY, 5の倍数からなる部分集合をZとする。このとき,集合 (XY)UZの要素の個数は 集合 XUYUZの要素の個数は 個, 1個である。 n((XnY)UZ) = n(XY)+n(Z)-n((XY)NZ) n(XUYUZ) = n(X)+n(Y)+n(Z) on(XY)-n(YNZ)-n(ZX) + n(XnYnz) X={3.1, 3.2, ......, 3-50} であるから Y={4・1, 4・2, 4・37}であるから z={5·15·2, ......, 5-30} であるから n(Z)=30 XOY は3と4の最小公倍数 12の倍数全体の集合S-1 XCY={12.1, 122, ......, 12·12} よって n(X∩Y)=12 YOZ は4と5の最小公倍数 20 の倍数全体の集合で百 YOZ= {20.1, 20.2, ......, 20•7} よって n(YnZ)=7 ZOXは 5と3の最小公倍数 15の倍数全体の集合で Z∩X={15.1,152, ......, 15.10} よって n(ZnX)=10 XOYOZ は3と4と5の最小公倍数 60の倍数全体の集合で XYZ={60・1,60・2} n(XAYNZ)=2 動画集! n((XnY)UZ)=12+30-2=740 よって したがって n(X)=50=1.3150÷3の商は50 (Y)=37 ■150÷4 の商は 37 ■ 150÷5の商は30 XOY を A とおくと n(AUZ) = n(A)+n(Z) n(ANZ) - n(XUYUZ)=50+37+30-12-7-10+2=90 [摂南大] 150÷12の商は12 ■150÷20の商は7 150÷15の商は10 150÷60 の商は2 246001 (1) BUSIN AS

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English Senior High

文法の間違いや言い回しが変でないかなど添削して欲しいです。お願いします🙇🏻‍♀️

コミュニケーション英語ⅡI 表現課題 ⑤ 1.物語を作ってください。 タイトルもつけましょう。 ただし、教科書 p129 の 1 2 の 10 個の文の中から2 文、3の指示に従って作った英文1文の計3文は必ず含めてつくること。 使った3文については、赤で下線 を引いておくこと。 分量は250語以上書いてください。 語数は自分で数えてタイトルの行に書いてください。 ( 締切 / ) 21で作ったお話を授業内で発表します。 発表時間は2分以上6分以内です。 しっかり覚えて、 何も見ずに発 表できるように準備しましょう。 went Title 45 Once upon a time, there was a little girl named Mary She lived with her sick mother. The doctor wanted to Cure her mother's illness, but the problem is that he didn't know how to cure her. Then Mary thought that she might find out Something if she meet to a knowledgeable old man in town, so she is The old man said, "My wife had the same ? disease. But the medicine I got cured her." He had a provid expression. Mary asked him where he could get the medicine. 23 to the man. 82 " IL It's a scary witch's house," he said. Mary was scared, but 104 decided to go to the witch's house for her mother. After that, 116 She got a map and walked to the witch's house. 語 11 22 33 126 After walking for a while, it got darker and darker, and 139 it was very spooky. Mary was frightened but kept walking. 129. It was then. She found the witch's house! She was so happy that she opened the door without knocking. There was a witch there, and she said You are a bad girl to come into my house without knocking". The witch transformed her into a toad. She cried because she had not expected the witch was so Terrifying. Still crying, she insisted to the witch that she desperately wanted the medicine. The wich was mored by Mary's impassioned appeal. And the witch said of If you give me ten years your life, I'll give you the medicine? She accepted the offer. The witch restored her original form. and extracted the medicine from the flowers. Then she thanked the witch and returned home safely. Mary's mother was cared by the medicine and lived happily with Mary. Later that day. and she asked Mary went to thank the knowledgeable old man him how to convinced the witch to give the medicine. He said, 「 11 I told the witch that I would give you the life cr 11 of the next person who visited you for 10 years." (55

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