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英語 高校生

答えに解説がなくて困ってます。 下の長文を翻訳してください。

〔Ⅰ〕 次の英文を読み. 設問 1~21 に答えよ。 Sandy lives in an apartment so small that when she comes home from shopping, she has to decide what to move out to make room for her purchases. She struggles day-to-day to feed and clothe herself and her four-year-old daughter on money from freelance writing jobs and helping neighbors. (2) Her ex-husband has long since disappeared down some unknown highway, probably never to be heard from again. As often as not, her car decides it needs a day off and refuses to start. That means bicycling (weather permitting), walking or asking friends for a ride. 13 The things most Americans consider essential for survival- a television. microwave, big freezer and high-priced sneakers are far down Sandy's list of "maybe someday" items. (5) Nutritious food, warm clothing, an affordable apartment, student loan payments, books for her daughter, absolutely necessary medical care and an occasional movie eat up what little money there is to go around. Sandy has knocked ) more doors than she can recall, trying to find (7) a decent job, but there is always something that doesn't quite fit-too little experience or not the right kind, or hours that make child care impossible. Sandy's story is not unusual. Many single parents and older people struggle with our economic structure, falling into the gap between being truly self-sufficient and being poor enough that the government will provide assistance. What makes Sandy unusual is her outlook. "I don't have much in the way of stuff or the American dream," she told me with a genuine smile. "Does that bother you?" I asked. "Sometimes. When I see another little girl around my daughter's age who has nice clothes and toys, or who is riding around in a fancy car or living in a fine house, then I feel bad. Everyone wants to do well for their children." she replied. "But you're not angry?" "What's to be angry (9) and I have what is really important in life," she replied. "And what is that?" I asked. (10) "As I see it, no matter how much stuff you buy, no matter how much )? We aren't starving or freezing to death. (11) money you make. you really only get to keep three things in life." she said. "What do you mean by 'keep?" (12) "I mean that nobody can take these things away from you." "And what are these three things?" I asked. "One, your experiences: two, your true friends; and three, what you grow inside yourself." she told me without hesitation. (13) For Sandy, "experiences" don't come on a grand scale. They are so-called ordinary moments with her daughter, walks in the woods, napping under a shady tree, listening to music, taking a warm bath or baking bread. Her definition of friends is more expansive. "True friends are the ones (15) who never leave your heart, even if they leave your life for a while. Even after years apart. you pick up with them right where you left off, and even if they die, they're never dead in your heart," she explained. 16 ) to each of us. (17 As for what we grow inside, Sandy said, "That's ( isn't it? I don't grow anger or sorrow. I could if I wanted to, but I'd rather not." "So what do you grow?" I asked. Sandy looked warmly at her daughter and then back to me. She pointed toward her own eyes, which were shining with tenderness. gratitude and a sparkling joy. "I grow this." From the book Chicken Soup for the Woman's Soul by Jack Canfield. Mark Victor Hansen. Jennifer Read Hawthorne, and Marci Shimoff. Copyright 2012 by Chicken Soup for the Soul Publishing, LLC. Published by Backlist. LLC. a unit of Chicken Soup for the Soul Publishing. LLC. Chicken Soup for the Soul is a registered trademark of Chicken Soup for the Soul Publishing, LLC. Reprinted by permission. All rights reserved.

未解決 回答数: 1
数学 高校生

序盤で出てきたk=2とα=2を答えとしてはいけないのはなぜですか?

解答 672 重要 例題 102 2次方程式の共通解 2つの2次方程式2x2+kx+4=0, x2+x+k=0がただ1つの共通の実数解 つように定数kの値を定め、その共通解を求めよ。 2つの方程式に共通な解の問題であるから,一方の方程式の解を求めることが 指針 たら、その解を他方に代入することによって、 定数の値を求めることができる。 し、この例題の方程式ではうまくいかない。 このような共通解の問題では,次の解法 が一般的である。 2つの方程式の共通解を x =α とおいて,それぞれの方程式に代入すると ①, a²+a+k=0...... ② 2a²+ka+4=0 これをαk についての連立方程式とみて解く。 ② から導かれる k=-α²→α を ① に代入 (kを消去) してもよいが, 3次方程式と なって数学Ⅰの範囲では解けない。 この問題では,最高次の項であるα2の項を消去す ることを考える。 なお, 共通の 「実数解」 という問題の条件に注意。 CHART 方程式の共通解 共通解をx=α とおく 共通解を x=α とおいて, 方程式にそれぞれ代入すると ①, a²+a+k=0 2a²+ka+4=0 ①②×2 から ゆえに よって [1] k=2のとき 2つの方程式はともに x2+x+2=0 となり, この方程式 数学Iの範囲では, の判別式をDとすると D=12-4・1・2=-7 x2+x+2=0の解を求め ることはできない。 D<0であるから,この方程式は実数解をもたない。 ゆえに、2つの方程式は共通の実数解をもたない。 [2] α=2のとき ②から ...... (k-2)a+4-2k=0 (k-2)(a-2)=0 k=2 または α=2 ...... これが答え になるのはダメなのか 22+2+k=0 よって このとき2つの方程式は2x2-6x+4=0, x2+x-6=0 すなわち 2(x-1)(x-2)=0, (x-2)(x+3)=0 とな り,解はそれぞれ x=1, 2; x = 2, -3 よって、2つの方程式はただ1つの共通の実数解 x=2 をもつ。 以上から 共通解はx=2 =-6, α² の項を消去。 この考 え方は, 連立1次方程式 を加減法で解くことに似 ている。 k=-6 α=2 を①に代入しても よい。 Js] 注意 上の解答では、共通解 x = αをもつと仮定してαやkの値を求めているから、 求めた値に対して, 実際に共通解をもつか, または問題の条件を満たすかど うかを確認しなければならない。 WATEM 練習 2つの2次方程式x2 +6x+12k-24=0, x2+(k+3)x+12=0がただ1つの実数を 102 共通認してき 数の数の '1 3章 1 2次方程式

解決済み 回答数: 1