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数学 高校生

[2]教えて欲しいです。 よろしくお願いします🙇‍♀️

(2) 地面から毎秒24.5mの初速度で球を真上に投げ上げるとき, 1秒後の (2) この球が最高点に達するのは投げ上げてから何秒後か。 さをym とすると,yはtの関数として y=24.5t-4.9? と表される。 例 207 いろいろな文 ) 次の関数を[ I内の文字で徴分せよ。 ) レーーh (r) 固題編 13 次の極限値 4 (2) S= 32 -2at + a La) 1 cm 200 (3) ig つの文字に着目) てはもともと レ= 定数 関数 f ds dt S=(1の衣) が 201 (2) 変化率…時刻とについての変化の割合 S(c)(2 1 V= Thr? 4んは定数と考える。 ■(1) (1) 1Vをrの関数と考えて よって 202(1) 2 - thr 3 どの文字で微分した。 示すために, V'ではた。 dV Th· 2r = ニ dr S=a°-2ta+3t (2) Sをaの関数と考えて dV 38を人 dr のように書く。 よって dS = (α')-2t(a)+ (3t°)'=D 2a-2t tは定数と考える。 (3t°) = 0 da のは。 (2) t秒後の半径は(t+1)cm であるから 203 次。 S= 4(t+1)°= 4x(+2t+1) 半径rの球の表面積を dS = 4(2t +2) =D 8x(t+1) dt とすると S= 4r よって t=5 を代入すると ゆえに,5秒後の表面積の変化率は 48π cm?/s = () 87·6= 48π 204 習 207 (1) 次の関数を[ ]内の文字で微分せよ。 (1) V=-h (h] 3) y=d+6ab+95 [b]iち爽ケ換る (2) y= °+6ab+96° [a) 205 (1) 3秒後の球の速度を求めよ。 ()18-) ロセス

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英語 高校生

画像の1番下の Q1 What were the good points of the 20th century? What were the bad points? の答えはどうなりますか?

“Looking Back at the Twentieth Century" is an exhibition of 300 photographs which show us the history of the past In the entrance hall the guide introduces the look back at = recall ~ century. photographs. Ladies and gentlemen, welcome to “Looking 5 Back at the Twentieth Century." /The 20th century was an age of great pregress in science and communications. People's lives became richer and more comfortable. People achieved greater freedom 10 and equality, and seemed to be closer to the dream of living a happy life. But it was also an age of terrible wars, and G-2 tens of millions of ~ tens of millions of people lost their lives. The photos =a great many ~ here will show you what people like you and me 15 went through in the 20th century. As you look at G-1 them, ask yourself: “How would you feel if these O cannot rememi were photos of your own family and friends ?” Some -ondemned to rg George Su will shock you; some may make you sad or angry. But they will also give you a message for our future. Ago |20 Before you look at the exhibition, I would like to show you twophotographs which are particularly TF important to us. fotod freedom [fri:dan entrance [éntrans] progress [prágras] achieve [atfi:v] terrible [térabl] particularly [partikjalarli] exhibition (èksibifan] equality [ikwálati] 15. go through Many people went through hard times during the war. G-2 She told me how she had solved the problem. G-1 Ifihad a lot of money, I could buy that sports car. Q-1 What were the good points of the 20h century? What were the bad points? e? 113

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