(2)でなぜ47桁でなく48桁になるのかが分かりません

286 基本 例題 183 常用対数と不等式 (9/23x11/1511/2011/23090 10gi03=0.4771 とする。 福岡工 (1) 3" が 10桁の数となる最小の自然数nの値を求めよ。 (2) 3 進法で表すと 100 桁の自然数Nを, 10進法で表すと何桁の数になるか。 基本182 指針 (1) まず 3” が10桁の数であるということを不等式で表す。 (2) 進数Nの桁数の問題 不等式 数IN < 数の形に表す ・・・・・･ 改訂版チャート式基礎からの数学A 基本例題142参照 3100-1≤N<3100...... に従って、問題の条件を不等式で表すと 10進法で表したときの桁数を求めるには, 不等式①から, 10" 'MN-10"の形を導き たい。そこで,不等式 ①の各辺の常用対数をとる。 >2杯で考えると10≦X<10 10x210 解答 Nがn桁の整数 図 (1) 3” が10桁の数であるとき 10°≦31010 10-¹≤N<10 各辺の常用対数をとると 9≤n log103<10 ゆえに 9 ≦0.4771n<10 9 10 よって ≤n< 0.4771 0.4771 したがって 18.8..... ≦n< 20.9････ この不等式を満たす自然 は, 19,20であるが, この不等式を満たす最小の自然数nは n=19 「最小の」という条件があ (2) Nは3進法で表すと100 桁の自然数であるから るので, n=19 が解。 3100-1N 3100 すなわち 399 ≦N < 3100 各辺の常用対数をとると 9910g 10 310g10N <10010g103 _99×0.4771 ≦log10N <100×0.4771 ゆえに すなわち 47.2329 ≦ log10 N <47.71 よって 1047.2329≦N < 1047.71 ) ゆえに 1047 <N<1048 100.4771=3 <p=logaMa=M したがって,Nを10進法で表すと, 48 桁の数となる。 別解 10g103=0.4771 から ゆえに, 3% ≦N < 3100 から (100.4771) 99 ≤N<(100.4771) 100 よって 1047.2329 ≦N < 1047.71 ゆえに 1047 <N < 1048 したがって,Nを10進法で表すと, 48 桁の数となる。 練習log102=0.3010, 10g103=0.4771 とする。 ②183 72 を小数で表すとき,小数第3位に初めて0でない数字が現れるよう 自然数nは何個あるか｡ (2) logs 2 の値を求めよ。ただし, 小数第3位を四捨五入せよ。またこの結果 〔類北里 利用して 410 を進法で 110°=3 ABS 比べ 初め 109,10 指針 解 現在の とする 両辺の ここ よっ ゆえ した 練習 18-

高さが等しいから面積も等しい、、のところがよくわからないです！解説お願い致します！

0 C S xxsing めてもよ 目である 180° <1 b,cが 基本例題159 図形の分割と面積 ( 1 ) 次のような四角形 ABCD の面積Sを求めよ。 平行四辺形ABCD で, 対角線の交点を0とすると AC=10, BD=6√2,∠AOD=135° (2) AD//BCの台形ABCD で, AB=5,BC=8, BD=7,∠A=120° p.245 基本事項 ②2 基本 158 ******... 指針 四角形の面積を求める問題は,対角線で2つの三角形に分割して考える。 (1) 平行四辺形は対角線で合同な2つの三角形に分割されるから S=2AABD また から ABD=2△OAD BO=DO よって,まず△OADの面積を求める。 4章 (2)台形の面積=(上底+下底)×高さ÷2 が使えるように、未知の量である上底 AD の 長さと高さを求める。まず, △ABD (2辺と1角が既知)において余弦定理を適用。 CHART 四角形の問題 対角線で2つの三角形に分割 解答 (1) 平行四辺形の対角線は,互いに他を2等分するから OA= =1/12AC=5, OD=122BD=3√ℓ A (*) △OAB とAOAD は, それぞれの底辺を OB, OD とみると, OB=OD で, 高さ が同じであるから、その面積 も等しい｡ どこ? 135°゜ m したがって LOAD=1/12 OA･OD sin 135° △OAD= B [参考] 下の図の平行四辺形の 面積Sは = 1/2-5-3√/2-1/2 = 1/250 ・5・3√2・ S=1/2AC･BDsine √√2 15 [練習 159 (2) 参照] * =4･ I よって S=2△ABD=2・2△OAD 2 0 (2) △ABD において, 余弦定理により 72=52+AD²-2･5・AD cos 120° 5 ゆえに AD2 +5AD-24=0 B よって (AD-3)(AD+8)=0 B H AD>0であるから AD=3 8 頂点Aから辺BCに垂線 AH を引くと AH=ABsin∠B, ∠B=180°∠A=60° よって S=1/12 (AD+BC)AH=1/12(38)・5sin60°=55/3 ②159 (1) 平行四辺形ABCD で, AB=5,BC=6, AC=7 練習次のような四角形 ABCDの面積Sを求めよ (O は ACとBDの交点)。 (2) 平行四辺形ABCD で, AC = p, BD = g, ∠AOB=6 (③3) AD / BCの台形ABCD で, BC=9, CD=8,CA=4√7,∠D=120° らくなと do -=30 ALD 120° 7 C 247 AH sín ZB= AB -=AH = ABsin LB AD//BC (上底+下底)×高さ÷2 1 三角比と図形の計量 <B h = AB sinLB 19

(2)(3)で2！と3！になるのはなんでですか？ 720/2！という式になると思ったのですが、、、 教えて下さい。 お願いします🙇‍♀️⤵️

461a, a, b, b, b, c の6文字を, 1列に並べるときの並べ方の総数を考えるとき, 次の問いに答えよ。 □(1)a,b それぞれに番号をつけて, a1, az, bi, bz, b3 として,この5文字と c の合わせて6文字を1列に並べる並べ方は何通りあるか。 □ (2) (1) の並べ方の 「 a bibbs」 の a, a2 をaとするとき (1) の並べ方の中 に「aabb2bc」 となる並べ方は何通りあるか。 □ (3) (1)の並べ方の 「alazbi babs C」 のbi, bz, bs をbとするとき, (1) の並べ方 の中に 「zbbbc｣ となる並べ方は何通りあるか。 □ (4) a, a, b, b, b, c の6文字を, 1列に並べるときの並べ方は 何通りあるか。

教えてください！ お願いします！！ 至急です

2. 本文を読んでT/F の確認をしましょう。 In London, I happened to watch a TV program about a school for orphans and street children in Nairobi, Kenya. The children looked unhappy. I suddenly felt an urge to go to Kenya and paint something for those children. It wasn't easy, but finally in 2006, I got to Kenya, found the school, and was able to paint for the children. I painted an angry dragon. I was happy with it, but a teacher complained, "The children are frightened by the dragon. Some of them refuse to come to school." The children thought that it was a big snake. They did not know that dragons are imaginary. I asked them, "What would you like me to paint?" "Lions!" "Baobabs!" I asked the children to help me, and we had a lot of fun painting together. According to the teachers, the children became more active than before. Creating happiness through painting in That was a turning point in my career. collaboration with others is my thing. I made up my mind to do a painting project every year in different parts of the world. 3. もう一度本文を読んで以下の問いに答えましょう。 Q-1 Why did some of the children refuse to come to school? Q-2 Who did Miyazaki ask for help with the painting? Q-3 "Creating happiness through painting in collaboration with others is my thing." "My thing" means a. my life's work. b. my painting technique. c. my favorite belongings.

添削お願いします

- oggyandio in ライティング apon●以下のTOPIC について, あなたの意見とその理由を2つ書きなさい。 CORPOINTSは理由を書く際の参考となる観点を示したものです。 ただし、これら 以外の観点から理由を書いてもかまいません。 ●語数の目安は 80 語 ~100語です。 address 4 ●解答は, 解答用紙のB面にあるライティング解答欄に書きなさい。 なお、 解答 欄の外に書かれたものは採点されません。 ●解答が TOPIC に示された問いの答えになっていない場合や, TOPIC からずれ Memoi ていると判断された場合は, 0点と採点されることがあります。 TOPICの内容 zulug をよく読んでから答えてください。 Tioni co TOPIC Some people say that people today should spend less time using the Internet. Do you agree with this opinion? 30 POINTS babys officials angueibabsubs ● Communication ● Education ● Health

解答をお願いします！自分のかきこみありますが、気にせずにお願いします！

② 次の各文の空所に入れるのに最も適当なものを.①~④ の中から1つずつ選べ。 (配点20点) 1. My company is sending me to a small town in Georgia to manage a factory. ) about five miles to the north of Atlanta. The town ( laid 2 lays (3) lied 4 lies 2. Did she ( ) you why she was absent again? She might have some health problems. You should sit down and talk to her. (1) talk (2) explain (3) (4) tell say 3. Cathy always feels embarrassed when her father comes to pick her up in his old car. She's going to ( ) him into buying a new car. 1 say talk (4) speak tell 4. Before democratization, many people in that country were (1) a chance to prove their innocence. 4 1 disliked denied rejected opposed a 5. "Hello, Mr. Smith. How may I help you?" "Hi, I'm going out for lunch, so I would like ( ) while I am away." 1 to clean my room 3 my room to clean to be cleaned my room 4 my room to be cleaned

この答えを教えて欲しいです。🙇‍♀️

Level Passage : 2:30 Lesson 5 Jet Reading 22 ⑤ Questions: 2:00 Compared to dogs and other pet animals, cats often have lots of freedom. Many owners let their pet cats go outside whenever they want to. But where do they go? Does your cat visit your neighbor's house for extra food? How far from home does your cat actually travel? Cat owners have been wondering about such questions for a long time. 5 To find out where cats go and what they do, researchers decided to track them by putting a GPS (Global Positioning System) device around their neck. It is well known that cats are natural hunters. They often chase and catch *wildlife, such as birds and other small animals. It was therefore believed Hoor war301 that cats may go far from their homes to hunt. However, the research showed some surprising facts about cat *behavior. It seems that most cats 10 don't travel very far from their homes. On average, they move around two houses away. Owners were *relieved to hear this result because it confirmed that their cats do not cross major roads. There was another interesting result. One female cat walked more than 1 kilometer from her home. When the owner checked her GPS data, they discovered that the cat had gone to their old house. It showed that cats remember the past longer and more clearly than we think.(219 words) *wildlife 44 *relieve ~を安心させる *behavior Infogt) A Choose the best options. (2 points x2) According to the passage, which of the following statements are true about cats? (Choose two options. The order does not matter.) so svom i da a. They enjoy more freedom than other pet animals. imove sill niw nuo exentabilt o b. A GPS device was put around a cat's tail by researchers. c. They go far from their homes to hunt wildlife. Sanino sasd Juoda su v d. The research proved that most cats cross major roads. of Inboq bow it bean 17 s e. They may remember the past more clearly than we expect. Bewe )( B Fill in each blank with a suitable word. (2 points x3) ******* ******** Many owners let their cats go (¹ ), but no one exactly knew where they went and what ) the cats by using a GPS device. they did. In order to find this out, researchers decided to (² maswid Bai As a result, they learned that most cats didn't travel very far from their homes. One cat, however, walked more than 1 kilometer from its home. It turned out that it had (3 shows that cats have a better memory than people thought. ) its old house. This result sal al commaly to pound How Judw grinidman [catch/ forgotten / visited / outside /track/inside] Time ☆ ~1:45 ~2:00 ~2:15 ~2:30 ~2:45 ~3:00-3:30 Reading Speed X WPM 125 109 97 88 80 73 63 /10 Name Class No. 10 2015

トピックに対して120〜150語の英文を書けと言う問題です！英語が苦手なので間違いが多数あると思いますが、宜しければ採点をお願いいたします🙇‍♀️ TOPIK Agree or Disagree /The Japanese government needs to enc... Read More

この写真の、2、4、5、7、16、18が分かりません💦 どなたか教えてください🙏

1 Choose the appropriate word from the word box below to complete a sentence. (語群から適切な単語を選び、 意味の通る文を完成させなさい。) 知識・技能 1. Yes, go ahead. ( ) I use your bathroom? 2. You played outside a lot. You ( ) be hungry. 3. My mother ( ) often make cookies on Sunday. It's April now. It ( ) have snowed in Kyushu. It was sunny. You ( ) have taken your umbrella. My father is overweight, so he ( ) do more exercise. 7. He ( ) listen to his parents and always gets his own way. 8. Hasn't she arrived yet? What happened? - I don't know. She ( ) have missed her train. can can't may needn't should won't must 2 Fill in each blank with appropriate English words. (空所に適切な語を入れなさい。) 知識・技能 9. "( ) are you?" "I am tired." 10. "( ) won the race?" "Mike did.” 11. I was so tired, ( ) I gave it another try. 12. "Would you ( ) a cup of coffee?” “Yes, please.” 13. This is a non-smoking area. You ( )( ) smoke here. 14. "( ) were you absent from school?" "Because I had a cold." 15. We help with the housework ( ) my parents are busy at work. 16. “I'd like a hamburger, please." "O.K. Is it for here ( The weather forecast says it will rain, ( ) to go?" 17. ) I'll take an umbrella with me 18. "What do you want to do today? Play a game?" "I ( ) ( ) watch a movie ( ) play a game today." 4. 5. 6. would

英語の並び替え問題です。 解説お願いします。

2. 象は記憶力が優れているだけでなく抽象的に考えることができるということで注目S に値する｡ Elephants are notable in that they are capable (abstract / as / as / great / having / of / thought / well) memories.