学年

質問の種類

英語 高校生

答えを教えて欲しいです

Past Tense, Past Progressive (2) Warm Up! (1) ( に入れるのに正しくないものを1つ選んでください。(b) Warm Up He began to practice karate only ( ). 1. recently 2. two weeks earlier 3. these days 4. one week ago Part 2: Grammar Section 《解説と解答》 「彼はつい最近 (2週間早く; 先週) 空手の練習を始めた」 という意味ですから、 3. these days のみが、 過去形の動詞と共に使えない表現です。 these days は 「このごろ (最近)」 という意味で すが、 現在形 現在進行形や現在完了形とともに用います。 Warm Up! (2) ( に入れるのに最適な表現を1つ選んでください。 John didn't want to see me because he () his lunch. 1. once had 2. was having 3. has 4. took 《解説と解答》 「ジョンは昼食中だったので、私に会いたがらなかった」 という意味ですから、 ジョンが私に会い たがらなかった理由を完成させます。 私に会いたがらなかった時に進行していた動作が「昼食を取る」 ことですから 2. was having の過去進行形にするのが適切です。 なお、 have lunch の have は 「食 べる (eat) 」 の意味ですから、この意味の場合haveは進行形で用いることができます。 Exercise 5: Fill in the blanks in these sentences with one of the choices below. 3. A pine tree (a) stands 1. While Cindy. (a) was playing (b) is playing (c) played her violin yesterday, two of her strings broke. (d) has played up late the night before to 2. My paper was due yesterday, so I complete it. (a) stayed (b) stood (b) would stay (c) stay (d) am staying at the gate, and a girl was standing in its shade. (d) standing (c) was standing 4. The car wasn't here yesterday because Jane takes the bus, but the drivers were on strike. (a) uses (b) is using (c) has used 5. One of the boys (a) fall (b) falls 6. When the door bell rang, I (a) take (b) am taking 7. Mr. Brown (a) leave (b) is leaving (d) was using in the river, but I dived in and saved him. (c) were falling (d) fell a shower. (c) was taking the office only a minute ago. (c) was leaving 8. During the last earthquake books (a) fall it. She generally (b) are falling (c) had been falling (d) taking (d) left from the shelf. (d) fell Unit 4 Exercise 6: Fill in the blanks in the passage below with the correct form of the verb in parentheses. The first one is done for you. Mark (live) lives in Japan. His family (come) five years ago, when his father (start) Osaka. At that time Mark was still only 10 years old, and he (do) not want to leave America. But now, he (have) Osaka, and he likes living there. During the last summer vacation, Mark (go) United States with his parents. They (visit) Washington D.C., and Boston, and (enjoy) They also (go) Mark's grandparents. His grandparents (be) see Mark. One evening, as they (eat) the telephone (ring) Mark and his parents (talk) over one hour. Now Mark is back in Osaka. He (want) his grandparents again. He is (plan). America by himself next time. to Japan his own business in many friends in back to the New York, seeing the sights. to a small town in Connecticut to (see) very happy to a big chocolate cake, It was Mark's aunt in California. with her one after another for to (visit) to go to

回答募集中 回答数: 0
英語 高校生

3枚目の問いの答えを教えてください。 よろしくお願い致します。

Radio Host: durlar aind Roger Ali: Radio Host: Roger Ali: Radio Host: Roger Ali: Radio Host: Roger Ali: Roger Ali: Radio Host: Roger Ali: Radio Host: Welcome back. As I mentioned before the break, Roger Ali is with us today to talk about artificial intelligence. Thank you for being here, Dr. Ali. Thank you for having me. I'll be honest with you. When I hear the words "artificial intelligence," the first thing I think of is the character HAL from the movie 2001: A Space Odyssey. ch tud goons bad Radio Host:ome In other words, the search engine draws conclusions about what we're looking for on the Internet. Roger Ali: Sure. Many people remember HAL. In the movie, he's the computer that controls the systems of a spacecraft. He also speaks with the people on the spacecraft. And he's not very happy when the people decide to turn off the computer. In the movie, HAL becomes very dangerous. That's right, but fortunately, artificial intelligence in the real world isn't like HAL. Well, that's good! Can you tell us what is happening in the field of AI? Many interesting things. For example, when we search for something on the Internet, the search results that we see are chosen carefully. The search engine has learned which websites are the most popular, the most reliable, and so on. This prevents us from seeing a lot of websites we're not really interested in. Tosa Right, so it only shows us the information it thinks we want to see, which includes go advertisements as well. We usually see only ads for products that the computer thinks we might want to buy. You said, "It thinks," but is the search engine really thinking? IST That depends on your definition of thinking. The search engine is capable of learning machine learning-and it does have knowledge. Knowledge about the Internet. Are learning and knowledge part of your definition of thinking? They're part of it, but human beings are capable of so much more. We have our senses hearing, smell, sight, touch, taste-and our emotions. We notice a lot about the world, and we use our judgment to make decisions. That's true, and most computer scientists know that we can't replace human beings with computers. We don't intend to make robots for every kind of job, either. That's just not practical.

回答募集中 回答数: 0
数学 高校生

数Ⅲ 無限級数 下の写真についてです。 垢マーカーで印をつけた部分ですが、なぜこのような式になるのでしょうか? S2nー1(2nー1は小文字)のところ(一番最初)から分かりません。 説明を付け足してわかりやすくしていただきたいです。 よろしくお願いします

基本 例題 125 無限級数 1- 1/2+1/12/8/1/3+1/3/1/+1/1/1 ① について (1) 級数 ① の初項から第n項までの部分和をSとするとき, Szn-1, S2をそれ ぞれ求めよ。 (2) 級数 ① の収束 発散を調べ, 収束すればその和を求めよ。 2通りの部分和 S2n-1, San の利用 解普 (1) Sun-1=1-1/2 4 4 指針 (1) S2n-1 が求めやすい。 S2 はS2=S2-1+(第2n項) として求める (2) 前ページの基本例題124と異なり, ここでは( )がついていないことに注意。 このようなタイプのものでは、S を1通りに表すことが困難で, (1) のように S2n-1, S2 の場合に分けて調べる。 そして,次のことを利用する。 Sn=Szn1 [1] limS27-1 = lim S2 = S ならば limS=S 2400 [2] lim S21-1≠lim S2 ならば 1/12/+2/-/1/3+1/31/+1/1/1 n n =1-(1/2/-/1/1)-(1/3-1/31) (一号)= :1 n+1 ・+ S2=S24-1-1=1-1 n+1 lim S21-1=1, limS2=lim( 4 4 ・・・・・・・・・・・・・・ (2) (1) から よって limS=1 したがって, 無限級数 ① は収束して, その和は1 n+1 11:00 {S} は発散 + 基本124 = 部分和 (有限個の和)なら ( )でくくってよい。 [参考] 無限級数が収束すれば, その級数を、順序を変えずに 任意に( )でくくった無限級 数は,もとの級数と同じ和に 収束することが知られている。 検討 無限級数の扱いに関する注意点 上の例題の無限級数の第n項を [1/1 と考えてはいけない。 ( )が付いている場合は,n 1 n+1 番目の( )を第n項としてよいが,( )が付いていない場合は, n番目の数が第n項となる。 注意 無限級数では, 勝手に( )でくくったり、 項の順序を変えてはならない! [例えば, S=1-1+1−1+1−1+....=(1-1)+(1-1)+(1-1)+•••••• したら大間違い! (Sは公比1の無限等比級数のため、 発散する。) ただし, 有限個の和については,このような制限はない。 とみて, S=0 な 0などと] 211 4章 15 無限級数

回答募集中 回答数: 0