88番です 複素数を使わない解き方を教えて欲しいです ヒントや解説を見ても分かりませんでした

X (2)等比数列{an) が α2 = -1 かつ 13無限級数 17 無限級数 基本問題&解法のポイント 1 n(n+2) の和を求めよ。 18 (1) x * 0 とする。 次の無限等比級数が収 束するためのxの値の範囲を求めよ。 2-x+ (2-x) (2-x) + 無限級数の和 部分和 Sm を求めて {s. を調べる。 lim S が収束す ば、その極値Sが和。 無限等比級数 24 arn 7=1 ① 収束条件は 1 を満たすとき、数列{a} の一般 a=0 または |r| a 3 ②和は 1-r 項を求めよ。 A *87 (1) 無限等比数列{a}がan=2a2=2を満たすとき,{a} の 比を求めよ。 n=1 (2) 次の無限級数の和は自然数となる。 その自然数を求めよ。 [18 1800 n=6 (n-5)(n-4)(n-1)n [22 88 無限級数(1/2) co 2 (12) cos 筈の和を求めよ。 COS *89 座標平面上の原点をP6(0, 0) と書く。点P1, P2, P3, (-1) 1 P(cos(sin(x) (n=0, 1. 2. COS 3 [2] 2 3 を満たすように定める。Pの座標を (x,y) (n=0, 1, 2,... とする (1) P1, P2の座標をそれぞれ求めよ。 28 (2) x, yn をそれぞれnを用いて表せ。 (3) 極限値 limxn, limyn をそれぞれ求めよ。 11 (4) ベクトル P2n-1P2+1の大きさをln(n=1, 2, 3, ......) とするとき、 を用いて表せ。 (5)(4)について, 無限級数の和Sを求めよ。 n=1

④の答えを教えていただきたいです。 よろしくお願いいたします🙇‍♀️

100 182☆ Ex. 7 Change the sentences so as not to use the so-called Latin comparative words. ①She's four years senior to me. I'm seven years junior to my cousin. 3 Our swimming team is superior to theirs. 4 This computer is inferior to the new model now being produced. ⑤ There were many minor changes in the rules. One

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練習 29 次の和を求めよ。 n k=1 (3k2-7k+4)

6の問題で1のbeがbeingが正解なんですけどなぜing形になるのか教えてくれださい

(6) While many people find ①be in the water relaxing, ③others find it stressful. (7) The word amphibian comes from a Greek word ③means "living a double lif (8) There were ①more fire victims last year, ②with hundreds of people killing and Dinjured

次の文章をチャットgptに英語訳してもらったのですが、文法等間違いは無いでしょうか？ 添削お願いします！ ちなみに「あなたは1年間、1人で島に住むことになります。食べ物や水以外で、4つの物を持っていくことができます。何を持っていきますか？その理由も教えてください。」という質... Read More

教えてほしいです

ア to fold (4) After spending three hours ( 1 folding ウ folded H 次の □ (1) I saw something white ( )に入る最も適当な語 (句)をあとからそれぞれ1つずつ選び、記号で答えなさい。 ) in the water. to move ア take イ to take ア moving (2) Shall we have that young man ( H took (3) Our teacher stood on the platform, with his arms ( to be folded ). ウ moves I moved ) our pictures here? ウ taken ( ) ( ) ) their compositions, Mr. Brown went to bed. ( ) ア correct イ to correct ウ corrected I correcting □(5)( ☐ (6)( We have never 1 Never having ) been there before, we were lost easily. ( ) Never being I As we had ) his age into account, we should say he did well. ( ) ア Considering 1 Talking of Speaking of I Taking

教えてほしいです

5 次の文を favorite music. 内の指示にしたがって書きかえなさい。 (1) Taking off my coat, I set to work. (and she kept silent (2) When night came on, we started on our way home. (X) □ (3) Mary felt very happy. She began to sing a song. (分詞構文を用いて1文に) (4) He worked so hard that he had no time to play. (ĦX(C) (5) Not having been told how to drive his car, I was then at a loss. ()

教えてほしいです

に入る最も適当な語 (句) をあとからそれぞれ1つずつ選び, 記号で答えなさい。 □ (1) I saw something white ( ) in the water. ア moving to move ウ moves I moved ( ) (2) Shall we have that young man ( ア take イ to take taken ) our pictures here? I took ☐ (3) Our teacher stood on the platform, with his arms ( ア to fold イ folding ウ folded (4) After spending three hours ( イ to correct H to be folded ). ( ) their compositions, Mr. Brown went to bed. ( ) corrected ) been there before, we were lost easily. I correcting Never being I As we had ア correct □(5)( We have never 1 Never having ☐ (6) ( 1 Talking of ) his age into account, we should say he did well. > Considering Speaking of I Taking ( ) ( )

答えと翻訳お願いします。

1(内から適切な語を選んで,文を完成させましょう。 1. There were (few/little) people who bought the item online. not/no) 2. The project team had(not / no) idea of how to promote the new model. 3. (None / No) of the goods in the shop sold yesterday. 4. The company could (hard/hardly) sell the new product.

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3 次の英文を読み, 空所に入れるのに最も適切なものを, それぞれ下の①~④のうちから一つずつ選びなさい。 Cigarette smoking has negative effects not only on the body of the person who smokes but also on the body of someone who regularly breathes in second-hand smoke. Some of the most obvious effects are high blood pressure, sleep disorders, heart failure, and lung cancer. Despite such harmful consequences, ( 10 ). It has been reported that smoking creates feelings of pleasure, reduces tension, and promotes close relationships. Many smokers admit that smoking is a bad habit. ( 11 ), they tend to think that the number of cigarettes that they smoke is below the danger level and thus are not worried about the risk. Some even feel that they do not breathe in the smoke and that a cure for cancer will be found before they become ill with the disease. We have to admit that smoking is a habit which is difficult to break ( 12 ) the nicotine found in tobacco goes into the blood and stimulates the brain, making smokers feel pleasant for several minutes. What is more, the smoker usually feels anxious and wants to have another cigarette. ( 13 ) the policies that now ban smoking in most public areas, the stress that people often experience at work and at home can force them to smoke. ( 10 ) ①some people decide to stop smoking millions of people continue to smoke ( 11 ) the price of cigarettes has risen ①smoking is more harmful than drinking Therefore 2 While ③ Of course 4 However (12) 1 because 2 as a result 3 but SO (13) ①Despite 2 Although (3) But 4 Yet