この問題なんですが、2枚目の動画授業と似ている問題だったので参考に解いていたのですが、一枚目だと2log2anをbnとおいている辺りから進めません！2枚目のやり方の方が自分にはあっているなと感じたのでそっちのやり方で進めたいのですが、一枚目の問題になるとできなくなってしまい... 続きを読む

3 漸化式と数学的帰納法 (77) B1 題 B1.35 漸化式 antipan" たぶん次数相型 a=2, +1=4am で定義される数列{an} の一般項 am を求めよ. **** え方 漸化式がα+1 や ami などの累乗の場合や, に √ がついている場合, 10月のよう な積の場合は,両辺の対数をとるとうまくいくことが多い。 ここでは,a の係数4(=22) に着目して, 底が2である対数を両辺にとると, log2an+1=log2(4a)=log24+logza3 より 210g2a+1=2+310gzan ここで, log2am=b" とおくと, 26+1=36+2となり、例題 B1.32 の形の漸化式となる. a=2>0, an+1=4amより, すべての自然数nに対して an>0 an+12=4am について 底2で両辺の対数をとると, logzan+1=10g24a73 m 210gz4+1=log24+310gzan より oga=b とおくと, 210gza+1=310gza,+2 26+1=36+2 したがって,bn+1= 本来マイナス 3 20m+1 より、これを変形すると 3 に ここで, b1+2=10gza1+2=10g22+2=3 下の注〉 参照 漸化式の形と初値 すべての自然につい amであると分か bn+1+2=2(b+2) ……① 3 ①とb+2=3 より, 数列{b,+2} は,初項 3.公比の 特性方程式 3 α=24+1を解くと α-2 21egant 3/ 等比数列だから,一般項は, bn+2=3 3 3" すなわち, bn b-3-2-3-20 2= -x-2 よっち bn=10gzan=- 3"-2" 2n-1 3"-2" X=-2 より an-2 2-1 Ocus 漸化式 an+1=pan" は両辺の対数をとる -注> 「α」=2, am+12=4a73 のとき, すべての自然数について am>0」について a2=4a=4.23 仮に a2= -4 bu= 3" 244-2 よって, 20 3" 2 2.244 2 34-2" 21 (1) 34-2-244 21-7 える (

peopleが複数扱いだから1つ目のピンクのマーカーのところはhaveだと分かったのですが、どうして2つ目のピンクのマーカーのlovesは複数形になっているのですか？peopleが複数扱いだからloveだと思いました。 また紫のマーカーのisはkindが形容詞だからbe動... 続きを読む

例題2 冠詞の用法 次の日本文を英訳せよ。 日本人は自然美を愛し、動植物に思いやりのある民族として知られてきた。 解答例 The Japanese (people) have been known as a race that loves natural beauty and is kind to plants and animals.

中二の英語です。 wereとwasの違いがわからないので使い方を教えてほしいです。

(3) ( This curry was ) ( cooked) (by (Y (主語) (be動詞+ 過去分詞) 〜によって 3 日本文に合うように,( lt se en d )内の語を並べかえよう。 その学校は, 1人の日本人教師によって建てられました。 (by / was / that school / a Japanese teacher / built / ) That school was built by a Japanese teacher. (2) これらの本は, 祖父によって書かれました。 (were / my grandfather / these books/by/written / .) These books were written by my grandfather. (3)この歌は,たくさんの人に愛されています。 (many people/by/loved / this song/s 3 (1)

beenなのでアかウというのは分かったのですが、なぜウになるのか分かりません。 解説お願いします！

(4) A What kind of book are you reading? B : I'm reading a love story. A Is it written by a famous writer? B No. It is a story written by a singer been popular all over the world. 1. that is 7. that have ウ. who has I. who is

関係詞の並び替えの問題です。教えてください。

1) ボブはとても率直だ。 思ったことは何でも口にする。 (his mind, whatever, is on) Bob is very frank. He says 2) 私のチケットをだれでもほしい人にあげるよ。 I'll give my ticket (whoever, to, it, wants) 3) 私は運賃がどんなに安くても船旅はしたくない。 (is, cheap, however, the fare) I don't want to travel by ship, 4) 何が起きてもあきらめないで。 (matter, no, what, happens) fare don't give up 5) 私の兄は写真が大好きだ。 彼はどこにいてもいつも写真を撮る。 (where, is, he, matter, no) My brother loves photography. He always takes pictures,

当てはまる単語を教えてください

A. Circle the correct words to complete the information below. Cleopatra (69-30 B.C.) became queen of Egypt at age 18, when her brother became king. The pair 'competed/confirmed for control of Egypt, and Cleopatra lost. Later, two important leaders from Rome-Julius Caesar and Marc Antony-both fell in love with her. 2Involved / According to legend, Cleopatra was beautiful and very smart. With the help of Caesar and Juod Antony, she regained control of Egypt and played an important ³role/block in society. -08 Staying in power, however, was not an easy 4role/task. Cleopatra had many enemies¹ who eventually took power from her. In the end, the queen was too 5ordinary / proud to surrender² and instead chose to kill herself. But her legend survived, and today Cleopatra remains a(n) icon / task of ancient Egypt.

7行目の文の文構造教えて欲しいです🙏

25 The Maya loved cacao so much they used the beans as currency. They also believed it is good for you which many people still say today about cacao's most famous byproduct, chocolate. 物 In fact, cacao, also called cocoa, which is the not-so-secret ingredient of chocolate, s contains hundreds of bioactive* plant compounds, including flavanols*, which have with numerous possible health benefits. been (あ "Research on the bioactive components of the cacao bean pretty consistently shows that if you're consuming greater amounts of flavanols you see mechanisms (linked to heart disease are, by and large, favorably impacted," says Howard Sesso, an 10 epidemiologist at the Harvard T.H. Chan School of Public Health and Brigham and Women's Hospital. This includes improvements in blood pressure and cholesterol levels. But while cacao does have intriguing potential to boost heart health and brain function, no science supports eating large amounts of chocolate as a health food 15 sorry chocoholics. Here's why. - Spurred by chocolate's popularity, numerous studies have explored how the natural chemical compounds found in cocoa might be good for human health. While some have suggested that less than an ounce of dark chocolate might 本単位 VT improve heart health, much of the research doesn't involve eating actual chocolate not A but rather BAというよりむしろB 20 but rather its components. In 2022, (2) Sesso and colleagues found compelling evidence for the benefits of 説得力のある flavanols. In a clinical trial of 21,000 adults, they found that the half of the group that took 500mg of cocoa flavanol supplements daily had a significantly lower risk of death from cardiovascular disease* than those who had taken a placebo. Flavanols may also boost insulin sensitivity, according to some studies, which might be helpful in reducing the risk of type 2 diabetes. But the results aren't conclusive, and those at risk of diabetes might be () (to choose a cacao-inspired

自分自身のことを書く問題です。例文を教えてください。

Write about yourself. 1) I remember the day 2) I want to know the reason

答えと解説お願いします🙇

誤りがある部分を選びなさい。 27 My friend has just been wonderful time there, ③ both on campus ④ and off. admitted to the university; I ② hope her to spend a (同志社大) 28 John fell in love with Mary ② at first sight and proposed ③ for her at ④ once, but she ⑤turned him down. (中央大)

文法とか単語に間違えありますか？ 必ずベストアンサーはえらびます👍🏻

The girl sitting in front of 2 3 is Ami China I have apen made in ③I want to be a person who plays the piano ④English is a language loved by everyone. me well