(2)なんですけど、答えの方に、おもりをはなしてから、バネの伸びが初めて最大になるまでの時間tは周期Tの1／2倍であると書いてあるんですけど、なんで1／2倍なんですか？ →・→ ←・← みたいな感じでなるから1／4倍だと思ったんですが、、、

(1) ばねの自然の長さからの伸びの最大値xはいくらか。 となる位置で静かにはなしたところ単振動を始めた。重力加速 度の大きさをg とする。 183 斜面上のばね振り子 傾角0のなめらかな斜面上で, ばね定数kのばねに質量mのおもりをつけ, ばねが自然の長さ mmmmmmm] (2) おもりをはなしてから, ばねの伸びが初めて最大になるまでの時間を求めよ。 例題 38, 190, 191, 193 0

(2)と(3)のやり方を教えて欲しいです！！

次のような等比数列の初項から第n項までの和を求めよ。 3 (1)初項2,公比2 (2)7,公比 -4 (3)初項-2,公比12/27

x³-○x +○やx⁴-○x+○などの式を因数分解するときってどう考えれば良いんですか？

数Iの問題です。解説お願いします🙇‍♀️

□ 74 x=3-√10 のとき, 次の式の値を求めよ。 (1)x+1/2 (2) x² + 1/12/2 x2 (3)x2 1 x2 (4)x3+ 1 23

（3）です。解説に正と負にそれぞれ60メートル移動したと書いてありますが、等速度運動をしていた時はIメートルも移動していないという事ですか？

11 図1は、x軸上を移動する物体のx-tグラフである。 x [m] A B (1) 図1において、次の各区間での物体の速度を求めよ (向きは 60 符号で示せ)。 □① OA間 □ ② AB間 □③ BC 間 図2 C 020 40 70 t(s) 図 1 v [m/s] 2.0 0 100. -2.0 20 20 40 40 □(2) 物体のv-tグラフを図2にかけ。 □ (3) t=0s からt = 70sの間の物体の移動距離は何mか。 有効数字2桁で求めよ。 図2 60 Et t(s) AN

marry の形がわかりません

12 1 cause (3) What did he ( 1 ask (4) The girl closely ( ①resembles (5) Could you ( I talk ) my dead mother. 2 resembles of ) me which one is his? 2 speak TRIAL 2 1》各文の( )に入る最も適切な語句を選び、番号を答えなさい。 ④forgive (1) We don't ( ) the students to have visitors in the dorm rooms after ten o'clock. 2 prevent allow (2) John's vast knowledge didn't ( 3 let ) him solve the problem. 2 save ) to you? Anything interesting? 2 say ④help 3 allow mudis blom ud ④tell 3 talk lew to easly s dal CEME (成蹊) (関西学院)) (学習院大) (2) You c (3) The feve 2 各文には (1) The d tree. 3 resembles to ④resembles with (4) I [101] (高千穂新大) tell (5) Ma 3 say (名古屋学院大) (6) We ( ) New York "the Big Apple." ④ call (6) E 3 speak 1 introduce 2 say [開催要 (金沢工業) 3 (7) Peter doesn't get ( 1 along ) well with his father. 2 forward 3 much ⑥to (東大) Hi I laid (城西大) 4 of lliw 5 sowi (8) After some hesitation, he () the book on the desk. 19mm) Em 2 lied dary lay mid (tog slote lain (9) We ( ) the matter for hours but came to no conclusion. 001\1800 1 spoke (10) He ( ①informed 2 discussed were ③3 discussed about 4 said ) his teacher of his success in the examination. bise boy ind 3 noticed molni) 'nb4 suggested gnise 2 reported (11) The poor old man was robbed (d) his money. for me to absood from? \bo al two o'c (中央大) 日本 (1) ted bis(**) 4 of (2 (南山大) married with 1 off (12) In the spring of 1985, Frank (109) Jennifer in a large church ceremony.b I married 2 married to hely 3 got married eloqa (13) A: Haven't you finished that report yet? B: ( badguel in bodigusi) siges ) me a few more minutes and I'll get it done. 2 Share 3 Take \ is srt of nateil of (センター試験) Wait 1 Give ☞(14) A college education will () you to get a broader view of the world. ad ei w(t>- 1 let (15) This computer cost ( 2 enable 3 make 4 take (京都産業大) ③ of me 4 for me her speech. (大阪産業大) A+ 3 with ④against ) my whole salary last month. 1 me 2 to me (16) Astonishment almost deprived the girl ( 2 at 1 of (17) The welfare office provides ①food with people in need 3 people in need with food (2) vast Hints! (14) broader 2 food people in need 4 people in need for food (8) hesitation (9) conclusion (16) astonishment (17) welfare ( 秋田県立大)

間違っている所を選ぶ問題です 分からないので教えてください🙇‍♂️

2 Choose the underlined part that is INCORRECT. (1) art escor (1) Every alive creature in the sea ① 2. (2) I lost my wallet during I ②. ③ is affected by marine pollution. ④ was jogging through the park. (3) When I started teaching, my grandfather made me promise ① about peace with my students. ② 17 E Win fael (西南学院大) (近畿大) e that I will share his lesson Prague odi ③ quor bloo (SHAD) (4) You had better set the alarm clock for fear you should get up lately. ② ③ (玉川大) (5) Studies suggest that wolves and dogs split into different species around 100,000 years ① before. 2. (学習院大) 5 m otni ST DOYA (E) (6) I was spoken by a foreigner in English when I was waiting for a train at the station. ① ② ④ ( 広島修道大 ) 4 (7) Our hunger for new places and new ways have been with us for ages, almost like a mysterious disease. won and lemeziz m'l oli lololls (1)

数Aの問題です。全く分からないので分かりやすく解説してほしいです。お願いします🙇🏻‍♀️🙇🏻‍♀️ちなみに答えは20通りです。

12 赤玉と白玉がたくさん入った袋から1個ずつ取り出し,どち らかの玉が3個になったところで終了する。 このとき,玉の取 り出し方は何通りあるか。 ポイント① 「もれなく」, 「重複しないように」 数える。 樹形図を利用する。

17の(1)〜(3)解答見ても分からないので教えてください🙇🏻‍♀️

□ 17 数列{az},{bm} が等差数列ならば,次の数列も等差数列であることを証明せ (1) よ。 *(1){a5m} *(2) {2an-3bn} (3){azn+bsn}

間違っているところがあったら教えていただきたいです🙇‍♂️

4 1 Choose the best answer to fill in the blanks. (1) (1) You should ( ) or he might get lung cancer. ①get him stopped smoking 3 have him stopped smoking 2 get him to stop smoking have him to stop smoking /13 (京都女子大 ) ①great (2) The more money he had, the (y 2 greater ) care he had to take of security. 3 more greater (玉川大) most greatest (3) When I was in high school, I ( I have belonged belonged ) to the badminton club. 3 was belonging belong (南山大 ) 1) it. (4) I prefer playing baseball ( I to watching 2 to watch than (崇城大改) 3 for watching 4 watch (5) He just left home a minute ago, so he ( 1 cannot go 3 must be gone (6) "That's not your car." "My car ( 1 is being ) repaired, so I borrowed my brother's car." ③3 needs ) far. 2 cannot have gone (近畿大) ④must go (南山大 ) ( 大阪学院大 ) THIO 4 is under 2 wants (7) A knowledge of science is ( ) great use to everyone. 1 at 2 for 3 of 4 with (8) I wish ( ①having 3 I had 4 I will have (共立女子大) enough money to buy the computer game. 2 having had (9) His name is known ( ) everybody in this group. 1 as 2 with 3 for 4 to (京都文教大) ). so does Bill 4 Bill does so (駒澤大) (10) Bessie likes jazz dance very much, and ( 2 so Bill does ) help me if you don't have time. I can do the job myself. 1 Bill does (11) You ( 1 aren't able to 2 don't have to 3 aren't going to 4 should to 各種 ( 神奈川工科大) (12) India has the second ( ) population in the world. 1 large 2 largest 3 many ④numerous (千葉工業大) (13) Jack and Bill will meet me on Wednesday and Thursday ( ). ①respectably 2 respectively 3 irrespectively likely (松山大