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英語 高校生

34〜41の答えを教えてください。

A long email from Japan arrived in the computer of Bill Perkins, who worked in an office in London. The message was from a company in Tokyo that Bill's company had just sent a large order to. Bill read it once and then once (注1) named Steve to read. Steve read it and also looked again, looked puzzled, and then gave it to a colleague" confused. The letter began by praising the English company. () It then mentioned that some goods had been damaged during shipping (2) to Japan, and then the letter happily 34 (v) This kind of letter may work well in Japan, 35 it is not very successful as international communication. The letter 36 the reader to read between the lines to understand the problem and to sympathize with the company. (5) Of course, it also wanted Bill and Steve's company to rectify the trouble. But the letter did not spell out (4) that message very 37 . So Bill and Steve were thinking of just ignoring it. But then they received more correspondence from the Japanese company, this time with a specific request for action. It was an hour later when a second letter arrived that contained 38 for the first confusing letter. It also stated the intent of the Japanese company concerning the damaged goods. They wanted the replacement items shipped as soon (25) would foot as possible with no charges. Bill and Steve were happy once again because their insurance company the bill 16), and the goods would arrive in about ten days. (2) The Japanese company didn't follow the standard international business pattern in its communication. But the English company was 39 , too, because they hadn't realized that there was a deeper meaning to the letter. Bill and Steve had only looked at the communication's surface. It seems to me that both sides could benefit from a seminar on international understanding. (1) colleague: (2) shipping: (**) * (注3) rectify: 対応する (注4) spell out : 詳しく述べる (5) insurance company (注6) foot the bill: 費用を払う t (Terry O'Brien et al. Simply Reading, Simply Writing NAN'UN-DO) 6

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数学 中学生

なぜ3(2n+1)=3の二乗×ある数の二乗と表せられるのかわかりません。3の二乗はどこからきたのでしょうか。解説お願いしたいです。

1+3+5=√9=3のように、連続する3つの奇数の和の平方根が整数となる場合を見つ ため、Sさんは、次のような方法を考えた。 各問いに答えなさい。 Sさんの考えた方法 この3つの奇数の和は, (2n-1)+(2n+1)+(2n+3)=6n+3=3 (2n+1) となる。 を整数とすれば、連続する3つの奇数は, 2n-1, 2n+1, 2n+3と表される この3つの奇数の和の平方根 3 (2n+1) が整数となるので と表される。 3 (2n+1)=3×(ある数 ) さらに2n+1は奇数なので, (ある数) を小さい数から順に考えると, 3(2n+1)=3'×1^ これを解くとn=1だから, 3つの奇数は1,35となる。 3(2n+1)=3'×3^ これを解くとn=13だから, 3つの奇数は 25, 27, 29 となる。 3(2n+1)=3×5^ これを解くとn=アだから, 3つの奇数はイ,ウ,エとなる。 (1) ア ~エにあてはまる数を, それぞれ書きなさい。 (2) 連続する5つの奇数の和の平方根も,たとえば√1+3+5+7+9=√25=5のように、整 となる場合がある。 1+3+5 +7 +9 以外でもっとも小さい連続する5つの奇数を求めな さい。 3(2n+1)=3°×5°より, 2n+1=3×5° 2n=75-1 2n=74 n=37・ア… 2n+1=75より,3つの連続する奇数は73·イ,75・ウ,77・エ ... nを2以上の整数とすれば,連続する5つの奇数は, 2n-3, 2n-1, 2n+1, 2n+3,2カ+5で これらの和は, (2n-3)+(2n-1)+(2n+1)+(2n+3)+(2n+5)=10n+5=5 (2n+1) となる。 この5つの奇数の和の平方根√5(2n+1) が整数となるので, 5(2n+1)=5×(ある数)と表さ る。 さらに2n+1は奇数なので,(ある数) を小さい数から順に考えると, 2n+1)=5°×12 これを解くと, 2n+1=5 よって, 1, 3, 57,9となる。 これは不適 二小さいのは 5(2n+1)=5°×32 これを解くと, 2n+1=5×3=45 n=22 て、5つの奇数は 41 43, 45 47 49 ・・・答

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