教えてほしいです

2 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。 (6) When growing tomatoes, we know we should pick them when they're bright red. With carrots, however, ( 6 ) because they grow underground. ①we should pick them when they turn orange (2) it's hard to know when they're ready (3) we should grow them more carefully than tomatoes (4) it's easy to know when they're bright red (7) Although it is quick, easy and convenient to be able to look up information on the internet, it can sometimes be difficult ( 7 ) because there is so much information. to find what you are looking for (2) to improve the convenience of the internet (3) to get more than what you need that people often experie (4) to have good computer literacy (8) Would you be happier if you were richer? Many people believe that they would be. But research conducted over many years suggests that ( 8 ). People in the United States, for example, are, on average, richer than New Zealanders, but they are not happier. poorer people tend to worry about their financial problems 2 pleasure in life usually comes from great wealth (3) the best way to be happy is learning how to save money greater wealth doesn't generally imply greater happiness (9) Many European rivers were once heavily polluted by manufacturing industries. As a result, wild animals dependent on clean water disappeared. However, as stricter environmental standards took effect, rivers such as the Thames of London have become much cleaner. Consequently, ( 9 ). water quality has continued to decline wild animals avoid drinking from the Thames (3) wild animals are making a comeback in many rivers (4) wild animals no longer depend on clean water

青チャート例題38（2）(3)より2次式の解の種類について質問です。 Kの場合わけしないといけないのは分かるのですが何故(2)は実数全てにおいて異なる二つの実数解になるんですか？ (3)のように>0、=0、<0で場合分けする必要はないんでしょうか？ また(2)のような答えに... Read More

68 88 基本 例題 38 2次方程式の解の判別 0000 (3)x2+2(k-1)x-k2+4k-3=0 次の2次方程式の解の種類を判別せよ。 ただし, kは定数とする。 (2) 2x²-(k+2)x+k-1=0 (1) 3x²-5x+3=0 基 k p.66 指針 2次方程式 ax2+bx+c=0の解の種類は, 解を求めなくても, 判別式D の符号だけで 別できる。 異なる2つの実数解 質 公小 2次方程式の解の判別 D=0⇔重解 重解はx=- 2a D0⇔異なる2つの虚数解 解答 (2),(3) 文字係数の2次方程式の場合も,解の種類の判別方針は,(1)と変わらないが がkの2次式で表され,kの値による場合分けが必要となることがある。………… 与えられた2次方程式の判別式をDとすると (1) D=(-5)-4・3・3= -11<0 をも よって、異なる2つの虚数解をもつ。 つの (2) D={-(k+2)}-4・2(k-1)=k+4k+4-8(k-1) =k-4k+12=(k-2)2+8 ゆえに、すべての実数kについて よって、異なる2つの実数解をもつ。 する D>0 (3) 1/2=(k-1)^-1.(k+4k-3)=2k²-6k+4 =2(k2-3k+2)=2(k-1)(k-2) よって, 方程式の解は次のようになる。 D0 すなわちん <1,2 <kのとき 異なる2つの実数解 D = 0 すなわち k=1, 2 のとき 重解 D<0 すなわち 1 <k<2のとき 異なる2つの虚数解 D<0 一D>0」 CHES OF T {-(k+2)}2 の部分は, (1)2 =1なので, (+2 と書いてもよい。 1+CIDA ax2+2b'x+c=0 では D 4 α <βのとき 利用する (x-α)(x-B)>0 ⇔x<a, B<x α <βのとき (x-α)(x-B)<0 ⇒a<x<B D>0- 2 練習 次の2次方程式の解の種類を判別せよ。 ただし, kは定数とする。 31-12x 指

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(7) More renewable energy sources should be ( industrialized countries. 7. made use by made use of by ) developing as well as 1. made use of I. making use of by -8-

多様体を構成するために、位相空間に完全アトラスを導入するところで質問です。 完全アトラスを導入するメリットとして、この文章の下線部を「異なる座標系を用いたのに同じ計算ができてしまうという問題が解消される」解釈したのですが、そこがよくわかりません。座標系を変えて計算する... Read More

1 Two n-dimensional coordinate systems & and ŋ in S overlap smoothly provided the functions on¯¹ and ŋo §¯¹ are both smooth. Explicitly, if : U → R" and ŋ: R", then ŋ 1 is defined on the open set ε (ur) → ° (UV) V and carries it to n(u)—while its inverse function § 4-1 runs in the opposite direction (see Figure 1). These functions are then required to be smooth in the usual Euclidean sense defined above. This condition is con- sidered to hold trivially if u and do not meet. Č (UV) R" Ĕ(U) n(UV) R" S n(v) Figure 1. 1. Definition. An atlas A of dimension n on a space S is a collection of n-dimensional coordinate systems in S such that (A1) each point of S is contained in the domain of some coordinate system in, and (A2) any two coordinate systems in ✅ overlap smoothly. An atlas on S makes it possible to do calculus consistently on all of S. But different atlases may produce the same calculus, a technical difficulty eliminated as follows. Call an atlas Con S complete if C contains each co- ordinate system in S that overlaps smoothly with every coordinate system in C. 2. Lemma. Each atlas ✅ on S is contained in a unique complete atlas. Proof. If has dimension n, let A' be the set of all n-dimensional coordinate systems in S that overlap smoothly with every one contained in A. (a) A' is an atlas (of the same dimension as ✅).

数C空間ベクトルです。 この解説の7行目からがよく分かりません。 AGの中点の位置ベクトルは OA+OG/2とありますがこの式から求められるのはOFの中点の位置ベクトルでは無いんですか？ なぜこの式でAGの中点の位置ベクトルが求められるのかが分からなくて教えて欲しいです！ ... Read More

C1.58 平行六面体の4本の対角線は1点で交わることを示せ. 右の図のように、平行六面 G - 体を OADB CEFG とする. b+c C [土 言 こ とする. 1-2 B E D C 万 MAM A.M 0を基点とする点 A, B, Cの位置ベクトルをそれぞれ → a, OG=b+c より 対角線 AGの中点の位置ベクトルは, OA+OG _a+b+c) _ a+b+c 2 = 2 2 同様に, 対角線 BE の中点の位置ベクトルは, OB+OE_b+(a + c ) _ a + b + c 2 2 = 2 → → 対角線 CDの中点の位置ベクトルは, OC+OD_c+(a+b) _ a+b+c 2 2 2 50円 対角線 OF の中点の位置ベクトルは, OF a+b+c 072 2 よって, 4本の対角線の中点の位置ベクトルが一致す ら, 平行六面体の4本の対角線は1点で交わる.

教えてほしいです

① 次の各組の英文がほぼ同じ内容を表すように,に適する語を書きなさい。 (1) Looking at his alarm clock, he turned pale. he at his alarm clock, he turned pale. (2) As I hadn't heard from him, I decided to visit him. (3) If other things are equal, I will take this job. Other things ding heard from him, I decided to visit him. I will take this job. arrived at Naha around noon. reading, he listened to music. (4) Our plane left Haneda at ten, arriving at Naha around noon. Our plane left Haneda at ten, (5) Since he was tired of reading, he listened to music. ever h (6) My father sat on the sofa, and his legs were crossed. My father sat on the sofa, his legs (7) After the sun had set, the boys started for home. The sun the boys started for home. (8) If we speak generally, Japan has a mild climate. Japan has a mild climate. (9) Her mother having left her room, she began to cry bitterly. her mother (10) Unable to swim well, he doesn't like the sea very much. he left her room, she began to cry bitterly. swim well, he doesn't like the sea very much. (11) Turning to the left, you'll find a tall building on your right. you do/nothing) to the left, you'll find a tall building on your right.

教えてほしいです (画像横になっているかもしれません)

・次の文を分詞構文に書きかえなさい。 また, 英文全体を日本語に直しなさい。 (1) As I had never eaten that fish, I didn't want to eat it. ( (2) He doesn't know how to play the game, so he won't join us. ( (3) She has never been to Europe. Therefore she really wants to visit there. (4) Because nobody came to our house, we had a lot of free time. ike tomor (5) As we haven't done the work yet, we can't go skiing. )

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・次の各組の英文がほぼ同じ内容を表すように, に適する語を書きなさい。 (1) Since Ken was brought up in London, he speaks English fluently. up in London, Ken speaks English fluently. (2) Having read the letter, he kept silent for a long time. After the letter, he kept silent for a long time. (3) As there were a lot of things to do last week, I'm still tired. a lot of things to do last week, I'm still tired. (4) It had kept raining for days, so she couldn't dry clothes. raining for days, she couldn't dry clothes. (5) Emily, having seen the movie twice before, didn't want to see it again. Emily didn't want to see the movie again, seen it twice before. (6) She got lost, because she had left the map behind. She got lost, the map behind. (7) The machine, having been used for many years, still worked well. The machine still worked well, many years. it used for

訳について質問なのですが、 「by 場所」を「〈場所〉から」と訳せるとどれだけbyについて調べても書いていなかったのですが、こう訳すのは自然なことなのでしょうか？？

1. Less than 40 percent of all physicians in Wichita are employed as full-time staff by the hospitals where ------- practice. (A) they (B) their (C) them (D) themselves bisq sd bloode JS Virom sted 88W) or (8) CEO of Ad S NE

おしえてほしいです

3 次の各文を, [ ]内の指示に従って書きかえなさい。 (4x4 (1) Sam began studying Japanese a year ago. 〔不定詞を使って,ほぼ同じ意味の文に] (2) The girl is my niece. 〔下線部を 「あそこで走っている少女」という内容に] (3) Because I felt tired, I decided to stay home at night. 〔分詞構文に〕 (4) When he entered the room, he found a cat sleeping on the sofa. 〔分詞構文に]