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English Senior High

この問題の答えを教えてください🙇 Elixir3三訂版です。

26 29 27 28 UNIT 5 不定詞 ① Reading 44 Grammar & Expression Writing /28 (268 words) 18 Arda Tur 8 宇宙エレベーター (イメージ) Cross Reference 12 Listening 8 Reading 29.08 People have always been fascinated by the stars. In the late 1950s, we began using 929 916 Jeriw blb rockets to explore space. Today, rockets remain the only method for space travel. However, some scientists and companies are discussing other ways to travel into space. They are even suggesting that it may be possible to build a space elevator. Such an elevator would be ideal to take people or equipment to a satellite in Earth's vs m orbit, the moon, or even Mars. They believe it would be expensive to build, but cheap oved) snosili saporio of bedes bi 2515JmT: 63 to operate. It would be 3,000 times cheaper than rocket travel, and it would also be Jodm Tolvo Station and Tokyo Joy trw 59728 safer. These are all positive reasons for trying to construct a space elevator. Obayashi Corporation is a Japanese company that built Tokyo Skytree, and improved the Golden Gate Bridge in America to protect it against 10 earthquakes. It has now promised to make a space elevator, which will allow people itsetovnoj anti mon doiniqo ono ar jedW (1) to go to a space station. Currently, the firm is researching the materials and costs. in einbiguier Obayashi Corporation wants to complete its project by 2050. Insoningie pig sabi gdT Most experts say that such a space elevator is not realistic. They also say it biq SILP 10 would be too would be too expensive. Other experts, however, think that a space elevator will be 15 built one day. It may all depend on human imagination and ambition. In fact, when in 1961 President John F. Kennedy announced the dramatic and ambitious goal to send an American rocket to the moon, many people doubted it could be done. But his goal was achieved in July, 1969, when the astronaut Neil Armstrong stepped onto the Moon's surface. ange Total ⑨25分 0:40 大意把握 SW.Y 問1 次は ア. イ. ウ I 問2 20 E て 19

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English Senior High

UNITE STAGE2のLesson11です。 2️⃣と5️⃣と7️⃣を教えてください💦

Reading 00000000000000 Read the passage and answer the questions. The number of foreign tourists to Japan is increasing every 60 year. In 2016, over 20 million people visited Japan for sightseeing. Many of the visitors come from Asian countries near Japan. These tourists enjoy Japan's unique food, traditional buildings, 5 and natural scenery. But the Japanese government wants even more tourists to come. They started a plan to encourage tourists to visit the country more than once. First, the government asked tourists what they want to do during their first visit. Eating Japanese food is the most popular 10 activity. The least popular is skiing. Next, they asked them what they want to do on a second visit. The research shows that few tourists want to do the same activities again, such as eating Japanese food. However, skiing and snowboarding, and nature tours are more attractive for second time visitors than first- 15 timers. The biggest increase is in seasonal experiences, such as seeing cherry blossoms in the spring or falling leaves in the autumn. Clearly, foreign tourists want to experience something new and unique for their second visit. Things foreign tourists want to do in Japan 100 80 60 40 20 0 96.4. 58 ア -75.3- 46.8 87.4 47.6 visiting famous shopping places 3.1 18.2 This time in Japan DAS S Next trip to Japan 7.4 .16.2. nature tour / visiting farms and fishing ports 60-62 12.2 32.1¯ These results are very useful for 61 tour companies. They now 20 make 3 unique tours for foreigners. Some companies even provide tours to schools, farms, and fishing ports. On these tours, visitors from all over the world can enjoy many activities. They can enjoy communicating with Japanese people too. They will surely visit Japan many times. (229 words) 44 QHints scenery (si:nari seasonal [sizan cherry blossom bli 桜の花 fishing port

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Mathematics Senior High

写真の問題について質問です。 この問題の解答は最大値f(0)<f(3)とf(3)=<f(0)の二つだけで場合分けしていますが、f(3)=f(0)としたとき、 a=2、b=-10という他の答えが出ました。しかし解答はa=1、b=-17だけなので、f(3)=f(0)のみの場合分... Read More

例題 229 最大値・最小値から3次関数の決定 ★★★ 0<a<3とする。関数f(x)=2x-3ax²+b (0≦x≦3) の最大値が10, 最小値 が18のとき,定数a, bの値を求めよ。 例題223 ① 区間における増減表をかいて, f(x) の値の変化を調べる。 ②① の増減表から最小値はわかるが, 最大値は候補が2つ出てくる。よって, その最大 値の候補の大小を比較し,αの値で場合分けをして最大値をα, b で表す。 2SXX f(x)=6x2-6ax=6x(x-a) f'(x)=0 とすると x=0, a 0<a<3 であるから, 0≦x≦3における f(x) の増減表は次の ようになる x f'(x) f(x) 0 ゆえに b a また, f(0) f (3) を比較すると 0 + 1+0nieS1-0'niz0+28- 極小 b-a³ よって, 最小値は f(a)=b-a であり 1=S1-x$1+xS= 6-a³--18 1+0niaST-OS 2o E-nia8-(0)1 niz31-(0'niaS-1) ...... 1 最大値はf(0) = 6 またはf (3)=6-27a+54 2 S20203> x=0ofe 76-27a+54 1±√105 2 f(3)-f(0)=-27a+54=-27(a−2) 0<a<2のとき (0) (3) 2≦a <3 のとき (3) f(0) [1] 0<a<2のとき,最大値は f(3)=6-27a+54 よって 6-27a +54=10 すなわち 6=27a-44 これを①に代入して整理すると a³-27a+26=0 ゆえに (a-1)(a²+a-26)=0 よって a=1, 0<a<2 を満たすものは このとき, ① から [2] 2≦a <3 のとき, 最大値は f(0)=b よって b=10 これを①に代入して整理すると a³=28 283" であるから.α="283 となり、不適。 [1],[2] から a=1,b=-17 a=1 b=-17 最小値-18 最大 最小 (th極値と端の値に注意 大小比較は差を作れ S200x=Onla (最大値) = 10 因数定理による。 365 #(0)1 430 場合分けの条件を満 たすかどうかを確認。 (最大値) = 10 6章 36 場合分けの条件を満 たすかどうかを確認。 最大値・最小値

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