この問題のA、B、D、Eの解説をして欲しいです。 分かる所だけでも大丈夫です！お願いします(*^^*)

出」 [I) 次の英文の空所( A )~( F )を埋めるのに最も適当なものを下の1~9 の中から選び,その番号を記入せよ。 (合融の左飛)時人5用番 合融さ 充東 f Sr Si辺大 ご 指徴 I I'm delighted to drink a glass of water that began as snow in the French Alps hundreds of years before I was born, then became ice in a glacier, melted into deep underground springs, and finally was bottled and carried all the way across sea and land to sit available on the grocer's shelf. / For a very small price, I can have imagination in a glass- an ordinary glass( A ), the creativeness of the industrial revolution and the pleasures of a poetic view of life. / Moreover, this liquid is good for me. /It is me, as a matter of fact- 90 percent of my body is water. / There is high end of the water market as yet untouched: rare and historic water. | I'm thinking beyond natural purity - of water that has value because of its age or its association with special events or because there simply is no more of it ever to be had. / This seems like the fine-wine division of bottled water. /

何で等号成立で絶対値ab ＝ab

「n=!- Tu|ニa, |a|ニ-a, labl=la||6| |a=a", 応用 次の不等式を証明せよ。また,等号が成り立つときを調べよ。 等号が放 例題 したがっ- 4 考え方> |a|+|6|20, |a+b|20 であるから, まず両辺の平方の大小。 la|+|b|2|a+b| 5 相加平均 10 示す。このとき, 上で述べた絶対値についての性質を用いる。 a>0, 6 証明 両辺の平方の差を考えると 等号が成 (la|+|b|)?-la+bP=laP+2|a||b|+68-(a+b)° この く注意〉 =°+2|ab|+6ー(α-+2ab+6°) 例題 a> 11 立つ = 2(ab|-ab)NO 10 labl2ab 15 よって (la|+|6|)?2la+bP la|+|b|20, |a+b|20 であるから 証明 a> la|+|b|2|a+b| 等号が成り立つのは,Habl=ab すなわち ab>0 のときである。 終 よ

この証明方法でも大丈夫ですか？

2020 大阪大学 (理系) 前期日程 問題 3 I 解答解説のページへ nを2以上の自然数とする。 三角形 ABC において, 辺 AB の長さをc, 辺 CAの長 さをbで表す。ZACB=D"ZABC であるとき, c<nbを示せ。

この証明方法でもいいと思いますか？

2020 大阪大学 (理系) 前期日程 問題 3 I 解答解説のページへ nを2以上の自然数とする。 三角形 ABC において, 辺 AB の長さをc, 辺 CAの長 さをbで表す。ZACB=D"ZABC であるとき, c<nbを示せ。

この証明方法でもいいと思いますか？

2020 大阪大学 (理系) 前期日程 問題 3 I 解答解説のページへ nを2以上の自然数とする。 三角形 ABC において, 辺 AB の長さをc, 辺 CAの長 さをbで表す。ZACB=D"ZABC であるとき, c<nbを示せ。

Genius2のレッスン8 give it a try 大門1の(2)と、大門２の並び替えがわかりません、、わかる方お願い致します、

approaching. You may say it's not special because there seem to be some people who can fall asleep Choose the best words for the blank from “As a result, For example, In tree and the latter, on their trunk with the ground so that they can feel when enemies are Give If a Try addition, On the other hand". Many great scientific discoveries have happened by accident or from a mistake. Isaac Newton took a nap under an apple tree, which resulted in him being hit the head by a falling apple. It was this event that gave him the idea for the law of gravity. f Alexander Fleming hadn't left a sandwich by the window of his laboratory and forgotten about it, penicillin wouldnt have been discovered then. Having been in the right place at the right time or having madea mistake and having got an unexpected result, they made these important discoveries. penicillin-ペニシリン 2 Re-write the underlined part putting the best word in ( ). ) they ( )in the right place at the right time or ( 3 4 a mistake and ( ) got an unexpected result, they made those important discoveries. 6 (2) Put the words in the boxes in the right order to complete the sentences. standing on the train, holding on to a hand strap. The way people sleep seems somehow different from that of animals, are of really strange What is unique is the way some birds sleep upside Some which. It's well-known that animals in the down, foot holding on Wild such as giraffes or elephants sleep standing up. The former, neck on their resting with a one with to a branch. This would be impossible for us, but some birds any can't fall asleep other way. Ch C

OHベクトル・ABベクトルになる理由とその計算方法が分かりません。 教えてください🙏

591 2点 A(0, 7, 1), B(1,4, 0)を通る直線に t 原点0から垂線 OH を引く。このとき,点Hの B A 座標を求めよ。 592* 1辺の長さaの正四面体 OABC において, 辺 OA AB RC P com 出 上と 7 1 フ 。 n

英語 これの答えなんだと思いますか？解いてみたのですが答えがなくて自信がありません。15番の選択肢は①ago ②from now ③past ④in です。 答えだけでかまいませんお願いします🙇‍♀️

A frosty Novemper morning decorates the leafless trees to perfection. When I went up the hill, the white frost was sparkling, and the of milky mist hanging in the air. 6 trees arose on all sides. There were layers The frost has not yet taken to lingering* on the trees in the morning. The air was soon mild. When I went to plant a new tree just received from the nursery*, a gentle moistnes prevailed. Planting trees is pleasant work, encouraging I dug the hole, the soil moved easily beneath the spade, soft and damp. thought about the future, and especially 7 so when conditions are as favorable as this. The weak roots settle 9 into the loam and compost and bone-meal*, pressed into the pit that has been dug; and the infant" thing, little more than a twig, is magnified in the 10 into a handsome and graceful maturity. The village has responded readily 11 the urgings* to plant more trees. In various corners single saplings* are being installed; where more space is available, groups are being planted. A decision as to 12 is not arrived at without much discussion, opinion being split, in general terms, between decorative exoties which put on a great show of blossom and those less showy trees, unfortunately slower in growth, which are more 13 to the village scene. To my relief the latter choice has been preferred. My immediate contribution has been to plant on the grassy edge of the lane which passes my house. 14 there is no room_for anything tall, I chose a white hawthorn*, and as I set it in the earth I could picture it giving pleasure to people who will walk along this lane many years 15 long after I am dead. [注] linger「とどまる」、nursery「苗床」 loam and compost and bone-meal 「黒土(ローム)と堆肥と骨粉」 infant「未発達の」、urging「奨励」、sapling「苗木」、 hawthorn 「セイョウサンザシ」 問6 0 green 2 rich 3 bare fallen 6 問7 0 Below As ③ Though Above 7 間8 0 for 2) dark ③ pessimistic の optimistic 8 問9 0 up hard unresistingly with difficulties 9 問10 0 imagination 2 real ③ future の life 10 問11 0 for ③ to by 11 on 問12 0 the way of planting の what to plant ③ how to plant 0 plant or not 12 問13 の traditional 2 colorful ③ dangerous 0 against 13 問140 If As long as 3 Unless Since 14

この問題の解き方を教えて下さい！！

y 5回5回回 国回 をとり,この A 7-2 C」 Ca B * x 0 16 -カて (24,0) 64 3 回 62 24 (1) tan 2a = より, tan a = 63 6回 4 30 66 69 である。 7 15-4 tan 28 = より,tan 8 = 67 6回 24 V2(15-A。 (2) 1= 回図 であり, 25 図 =1だから, r= tan 8 となる。 tan a 7回 う) 30 (3) Iの座標は 78 3 回3 であり、=|8回82 である。 (35 83 (4) 2点A, C.を通る直線はy=- 85 である。 84 3 第3問(解答香号 61 85) 下図のように,座標平面上に点0(0, 0), 点A(0, 7), 点B(24, 0) がある。 AABO 内に半径rの2つの円があって, それぞれの中心は点 C」 および点C2 であり,これらの2円は互いに接している。 また, 点 C, を中心とする円は辺 AB と辺 AO とに接し, 点 Ca を中心とする円は辺 AB と辺BOとに接している。 辺AB の長さを1とし, ZBAC」 =a, LABC; = β とする(ただし, 0°<a<45', 0°<B<45°). △ABO の内心を1, ZC.ICa=0 とする(ただし, 0°<0<180°), このとき, 以下の問に答えよ。

どうやって解くか教えてください

g too s prOA 問題6.男子3人,女子7人の10人の中から3人の代表を選ぶとき, 次のような選び方は何通りあるか答えよ。 (1)男子1人,女子2人 A Sote 1000お g( (2) 少なくとも1人は男子 ad adh 0m e gst 問題7.ある 15人のグループが 10点満点の小テストを受け re odd of ub bavalab asw d ao guinoen eve ns yhuidi aitsw ot