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数学 高校生

(2)の解説の6<2a+5≦7の7は、一体どこから来たんですか?

60 ③24 基本 例題 33 1次不等式の整数解 不定! (1) 不等式 6x+8(6-x) > 7 を満たす2桁の自然数xの個数を求めよ。 (2)不等式 5(x-1)<2(2x+α) を満たすxのうちで,最大の整数が6であ るとき, 定数αの値の範囲を求めよ。 基本 29,32 CHART & THINKING 1次不等式の整数解 数直線を利用 まずは, 与えられた不等式を解く。 (1) 2桁の自然数x≧10 これと不等式の解を合わせて、条件を満たす整数xの値の 範囲を10≦x≦n の形に表す。 この不等式を満たす整数の個数は? (2)不等式の解はx<Aの形となる。 数直線上で A の値を変化させ, x<Aを満たす最大 の整数が6となるのはAがどのような値の範囲にあるかを 考えよう。 → x=6 は x < A を満たすが, x=7 は x<A を満たさないことが条件となる。 6 A 7 x 解答 (1) 6x+8(6-x) > 7 から 41 ゆえに x< -=20.5 xは2桁の自然数であるから 10≦x≦20 求める自然数の個数は 20-10+1=11 (個) (2)5(x-1)<2(2x+α) から 2x>-41 2桁 21 ← 10 11 20 41 2 x<2a+5 ••••.. ① ①を満たすxのうちで最大の整数が6となるのは 6<2a+5≦7 ←展開して整理。 不等号の向きが変わる。 解の吟味。 x のときである。 ① ゆえに 1<2a≦2 6 2a+57 x よって1/12 <as1 ①を満たす最大の整数 展開して整理。 6<2a+5<7 とか ま 62a+5≦7 などとし ないように。 等号の有 無に注意する。 ←a=1のとき、不等式は <7 で,条件を満たす。 本 a=1/2 のとき,不等式は <6 で、条件を満たさ ない。

未解決 回答数: 1
英語 高校生

下線部②のitと、③のones を本文中の英語で言い換えてほしいです!!

現在過去未来の完了形 3 現在完了形 2過去完了形 3未来完了形 4 現在完了進行形 5 過去完了進行形 Reading [思・判 ・ 表 12-14 本文 米 / LQ:米 40 13 12 Read the passage and answer the questions. Mr. Kunihiko Murai is a farmer who ( 1 ) rich from hydroponic farming. When he was young, Mr. Murai thought that the traditional way of farming was not exciting at all and he was looking for a new kind of farming. He read many books, and 5 finally learned about hydroponic farming in 1966. At first, Mr. Murai made an area to put water. He didn't add any soil, because he knew that the minerals in the water could help his plants grow. So, he put one hundred tomato plants into it. They grew fast and covered a large area. They also tasted 10 delicious. From the next year, he made the area with water bigger because he wanted to try to find the best way to grow vegetables with hydroponic farming. He used a lot of water for his experiments, so some people near his farm thought he was a very bad farmer. Later, however, more and more farmers began to 15 ask him how to do hydroponic farming because they found that 2 it was a better way. Hydroponic farming is a clean way of farming. Moreover, vegetables grow faster than the 3 ones in the fields, so farmers can grow them more often and they can get more money. Now, a 20 lot of farmers are using this way of farming to grow their vegetables. Q Hints hydroponic farming [hàidrǝpánik] **** area [éǝriǝ] . taste [téist] 〜な味がする (222 words)

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英語 高校生

①に何が入るか教えてください!! 2枚目の写真が選択肢です!

13 12 Reading 12-14 本文:米/LQ:米 Read the passage and answer the questions. Mr. Kunihiko Murai is a farmer who ( 1 ) rich from hydroponic farming. When he was young, Mr. Murai thought that the traditional way of farming was not exciting at all and he was looking for a new kind of farming. He read many books, and 5 finally learned about hydroponic farming in 1966. At first, Mr. Murai made an area to put water. He didn't add any soil, because he knew that the minerals in the water could help his plants grow. So, he put one hundred tomato plants into it. They grew fast and covered a large area. They also tasted 10 delicious. From the next year, he made the area with water bigger because he wanted to try to find the best way to grow vegetables with hydroponic farming. He used a lot of water for his experiments, so some people near his farm thought he was a very bad farmer. Later, however, more and more farmers began to 15 ask him how to do hydroponic farming because they found that 2 it was a better way. Hydroponic farming is a clean way of farming. Moreover, vegetables grow faster than the 3 ones in the fields, so farmers can grow them more often and they can get more money. Now, a lot of farmers are using this way of farming to grow their vegetables. QHints hydroponic farming [hàidrǝpánik]### area [éǝriǝ], 40 taste [téist] 〜な味がする (222 words)

未解決 回答数: 1
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