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数学 高校生

(2)の6<2a+5≦7の所でなぜ6は含まれないのに 7だけが含まれるのかがわからないです

基本例題 33 不定! 1次不等式の整数解 (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 ●基本 29,32 るとき,定数aの値の範囲を求めよ。 CHART & T HINKING 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 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。 解答 HATA (1) 6x+8(6-x) > 7 から -2x>-41 41 ゆえに -=20.5 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 x< 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 MINORIA のときである。 ゆえに 1<2a≦2 よって <ası> ( FRANARE 10 11 20-10+1=11 (個) (2) 5(x-1)<2(2x+α) から 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 s 2桁 20 41 12 HOPISHGA ←展開して整理。 21 6 2a+5 7 x LIGIHARASS ①を満たす最大の整数 不等号の向きが変わる。 ◆解の吟味。 ←展開して整理。 6<2a+5<7 とか 6≦2a+5 ≦7 などとし ないように。 等号の有 無に注意する。 不等式は α=1のとき, x<7で、条件を満たす。 a=1/12 のとき, 不等式は x<6で、条件を満たさ ない。

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英語 中学生

どこを抜き出して答えればいいのか分からないので答えをお願いします🙇‍♀️もし出来れば解説もお願いします🙏

次の英文を読み、以下の問いに答えなさい。 Cow. Chicken. Grass. Which two are in the same group? Your answer depends on where you were born and raised. T fedt af gnofed For a long time, *research psychologists have had an idea that East Asians and Westerners think about the world in different ways. There was not enough scientific *evidence to support this idea until recently. In the past 15 years, however, researchers have learned a lot about different thinking styles and the cultural differences that produce them. The story begins in 1972, when *Liang-Hwang Chiu, a professor of *educational psychology at *Indiana University, tested more than 200 Chinese and 300 American children. He showed some cards to each child. Each card had pictures of three things. One card, for example, showed a cow, a chicken, and grass. Chiu asked the children to say which two things were in the same group. Most of the American children picked the chicken and cow. They explained the reason by saying that "both are animals." Most of the Chinese children, however, put the cow and grass together because "cows eat grass." solib - People didn't think Chiu's study was very important in the years after its *publication because $*psychological scientists at that time paid little attention to cultural differences. In the 1990s, however, *cross-cultural psychology became 2"hot" and Chiu's findings were paid attention to again. 3 Researchers at the University of Michigan did Chiu's study again by testing college students from China, Taiwan, and the United States. Without using pictures, the researchers gave the students with and asked them to say which two three words shampoo, hair, and conditioner, for example 20 were in the same group. The Americans were more likely than the Chinese to say that shampoo and conditioner go together because they're both hair care goods. The Chinese were more likely to say that shampoo and hair go together because "shampoo washes and cleans hair." Why do East Asians and Westerners think differently? Most researchers believe the answer can be Taplapo 77 Step A Step B Step C

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