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数学 大学生・専門学校生・社会人

下の解説を見ても、文の2個目の問いが分かりません。分からないのは下の解説の赤線より下の部分です。

&を定数とするとき, 直線(k+2)x+(2k-3)yー5k+4=0 は kの値に関わりな すべての&について 成り立つ→んについての恒等式(→ 5) f(x, y)+kg(x, 3)=0→f(x, y)=0,g(x, y)=0 の交点を通る図形 162 重要例題34)交点を通る図形 l2:x+2y-5=0 の交点を通り, 直線 3x+2y=0 に平行な直線は |ウx+[エyー オコ=0 である。 (5 POINT! 解答 kについて整理して の 2x-3y+4+k(x+2y-5)=0 のがんの値に関わりなく成り立つとき ゃkについての恒等式。 2x-3y+4=0, x+2y-5=0 x=1, y=2 の距離 基58 これを解いて よって、A(ア1,イ2)が, ① が通る定点である。 またのは G, l2の交点を通る直線を表し,整理すると f(x, y)+kg(x, y)=0 の形をしている。 (k+2)x+(2k-3)y-5k+4=0 3 k= のとき, ① はx=1となり,これはx軸に垂直である。 素早く解く! 2 0で割れないため, 場合 分けが必要だが、, 共通テ ストでは省略できる。 よって,直線 3x+2y=0と平行にはならないから,不適。 AO k+2 3 をキーのとき,この直線の傾きは 2 2k-3 k+2 3 のが直線3x+2y=0に平行であるから 平行→傾きが等しい。 2 DA京 2k-3 →基66 →素早く解く! よって 2(k+2)=3(2k-3) ゆえに k= 13 4 お よって, 求める直線は 2.x-3y+4+ 13 (x+2y-5)=0 4 S..ま ゆえに 4(2x-3y+4)+13(x+2y-5)=0 よって ウ3x+エ2y-オ7=0

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TOEIC・英語 大学生・専門学校生・社会人

これ読んだんですけど、自分は世界史を理解してなかったので分からなくて翻訳アプリ使ったんですけどそれでも分からなかったので分かる方できれば解読お願いします┏●

Denmark in World War II お んれ By Hannah Arendt Hannab Arendt (1906-1975) was a political scientist! and pbilosopber born in Hanover, Germany. Wben Hitler came to power, sbe was forced to leave Germany and came to the United States in 1940. Sbe continued ber academic career by lecturing and teacbing at arious colleges, including The New Scbool for Social Researcb in New York City. Among the many books sbe urote were Eichmann in Jerusalem, On Revolution, and The Origins of Totalitarianism. Editor's Insert During the Second World War. the Germans invaded Denmark in April, 1940. In the beginning of her essay, Hannah Arendt explains that of the four countries almost completely immune to anti-Semitism- Denmark, Sweden, Italy, and Bulgaria Denmark challenged its German masters directly. As soon as the German authorities talked about forcing Jews to wear the yellow badge,' the Danes replied that all Danish citizens, including the King, would be wearing it the next day if the policy were carried out. In addition, all Danish government officials threatened 舌は the German authorities with their immediate resignation if the Germans started to implement any anti-Jewish actions. The following excerpt from Eicbmann in Jerusatem shows how the Danes sabotaged the German plan to carry out the mass extermination of the Jews. only 2タカ人の What happened then was truly amazing; compared with what took place in other European countries, everything went topsy-turvey. In August, ー after the German offensive in Russia had failed, the Afrika Korns 1943 had surrendered in Tunisia, and the Allies had invaded Italy すgovernment canceled its 1940 agreement with Germany which had permitted German troops the right to pass through the country. Thereupon. the Danish workers decided that they could help a bit in hurrying things そのうえに up: riots broke out in Danish shipyards, where the dock workers refused to repair German ships and then went on strike. The German militarv commander proclaimed a state of emergency and imposed martial la and Himmler thought this was the right moment to tackle the Te the Swedish す。 (continued on next page) themselves as Jews secret police), and overseer of the concentration camps

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