次の問題でまず青い線で何故ｔ／2となるのか解説お願いします🙇‍♂️

演習問題 150 a と 言, a + 君 と a - のなす角はともに60°で, は単位ベクト ルとする.このとき, a を求めよ.

なんで答えがプラスマイナスになるのかがわからないです…

Date Time (2) (sino + caso): No' 12 sino co so + caso" 1+2(-3) 2 sin+cos0 +3

102番の問題。解き方が分かりません。 判別式はどのような時に使えばいいのかも教えて下さると嬉しいです。

102 2次関数 y=x²-2(k-4)x+2kのグラフが x軸と異なる2点で交わるのは,実数がどの ような範囲にある場合か。 (ブラザー工業 改) y=x2-2c6-4)x+2k y=ax2+bx+cがx軸がと 2点で交わる <D=1400>ax=-belb-gde 判別式+200- XC= 29 D={-21k4}24.12k>O 103 -x2+2x-2はxのすべての実数値に対し て常に負であることを証明せよ。 (双日) hint y=-x2+2x-2のグラフで考える 4(1²-8k+16)-8>0 18k+16-2k70 k²-10k+1670 (k-8)(k-2)>0 ☆ k<2,8<k 104 2次関数 y=x2x+2のグラフと直線 上の説を

【至急！】①、②答え教えて欲しいです。

D ⑤ STUBY ITS Mr. Brown: Next question. I wonder if you know the phrase "pie in the sky." Moe: No. Please give us an example. Mr. Brown: Certainly. If I say I want to build a time machine, it's "pie in the sky." Kai: Do you mean your plan is really difficult? Mr. Brown: That's right! Moe: It sounds like "a rice cake in a painting" in Japanese. Kai: You can't eat it. Mr. Brown: There's probably no chance? I see.

準動詞のの範囲です！ 合ってるか見てください💦

□12. 先生は私たちに部活のミーティングに遅れないようにと言った。 語順整序 The teacher (be/not/to/told/us) late for our club meeting. told us to be not (新潟医療福祉大) (仁愛大) ④to buy □13. I strongly advise you ( ) a dictionary as soon as possible. ③③o buying ①for buying ②for buy □ 14. My grandma often ( ) me to study when I was a child. (東北学院大) ④supports ①courage ②encouraged ③ made □ 15. 子どもたちだけで花火で遊ばせておかない方がいい。 (佛教大) J You shouldn't allow (by/fireworks/toplay/the children/with) themselves. to play fireworks by the children with □ 16. インターネットのおかげで, いつでも音楽を購入して楽しめるようになった。 (東京経済大) The Internet (to/has/and/ purchase/ enabled/music/us) enjoy it at any time. has enabled to purchase music and us

準動詞の範囲です。 合ってるか見て欲しいです！

1. She let her children ( Oplay 演習 ) in the park until it got dark outside. ②played ③playing (産業能率大) to play 2. He wants to ( ) his wife to stop smoking. ①get 2 let ③make 3 make (中京大) ④have ☐ 3. Tom made his friends ( were mad about that. ①wait ②waited ) for him for a long time near the station. They Owaiting (日本福祉大) ④to wait (目白大) ④to run 準動詞 (佛教大) +repairer ☐ 4. He was made ( ) 10 kilometers. ①ran 2 run ③running 5. I'll have someone ( ②repair ) my computer as soon as possible. to repair ③repaired

わかりません

C 各組の英文がほぼ同じ意味になるように,( )に適切な語を書きなさい。(2点×5=10点) 1. We must finish this work by tomorrow. This work ( ) Cuis ( 2. When will they release the CD? When will the CD ( 3. It is said that Mark won first prize. Mark is said ( ) ( 4. Those men are repairing my car. ( My car is in you 5. My aunt gave me a nice watch. I ( ( wod finished by tomorrow.time an be 302 30 binge? )?he follow lisbon (o) at reason.duple ) won first prize.ow! turos e non lliw ol lo que ) by those men. ) a nice watch by my aunt. A nice watch was )( $30 9 am-8 pm Mondays) 212 G ) me by my aunt. 9 days

61番の問題です。 この問題を見た時、私は私達が子供頃は、毎年夏によく川へ泳ぎに行った。と解釈してoftenを選択肢から選んだのですが解答はwouldでした。 私はwouldは仮定法？とかでもし雨が降らなければ私達は出かけただろうっていう使い方しか知らなかったので説明をみて... 続きを読む

Theme 19 61 ☐ 62 出 When we were children, we ( every summer. 1 often He was a very stubborn person and ( ) go swimming in the river 2 never ③ would 4 will ( 青山学院大 ) ) not listen to me. 2 could 3 should ④might 22 (九州国際大) |頻出 1 would Theme 20 I inda doesn't dance much now, but I know she ( ) a lot.

この問題の解説(2ページ)の傍線部の意味がわからないです！教えてください🙏

Nancy is 1255 08 The mother was relieved to hear the news that her son would come home (2 test & noe 19rt to alluast or word of auoins awar t 29 Olive 2 living 3 life 4 alive arb to quits boils aswybody!

ジムが時間通りに来るかわからないという文章が英語ではI don’t know if Jim will come on time になるのですが、〜かどうかはIf+主語+動詞の原形とならいました。ならなぜJimの後にComeではなくwillが着くのですか？ 長文失礼します🙇‍... 続きを読む