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英語 高校生

15行目からどうしても訳せません。 訳教えて欲しいです🙇よろしくお願いします。

What would you do if you wanted to learn about something? A traditional way is to go to your bookshelf, pick up a dictionary or encyclopedia, and start turning pages. Now, however, you can turn on your computer, connect it to the Internet and start its search program. You just type in some keywords, click "search," and soon you will 5 have what you are looking for. 2 3) It seems as if anything you want to know can be found on the Internet. The range of information you can find on the Net varies from *gossip, to news, to the most advanced technological findings. Furthermore, the information is always fresh. New information is constantly added, past files are re-written, and *news reports are broadcast as they come in. 5) 3 What is being lost, though, is the joy of discovery. In many ways an Internet search is like a package tour. On a package tour, you generally know where you are going and see only what the *tour organizer has selected. Similarly, what you find in the Internet search is controlled by the site's owner or is the result of a computer program. On the other hand, turning the pages of an encyclopedia, as you look up an *entry, is more like wandering through a forest. You may accidentally find something interesting in the entry just next to the one you have been looking for. This may *stir up a new interest, which will eventually lead you into a totally different topic. 248 words>

解決済み 回答数: 1
数学 高校生

☆数2です☆ 2問ともわからないです。 あと1問目の解説で{f(x)-f(5)}と書いてあるのですがなぜそれを作らないといけないのかもわからないです。 どなたかよろしくお願いします🙇‍♀️

358 第6章 微分法 練習 [181 ** 例題 181 微分係数 (1) 微分係数の定義に従って lim- 考え方 (1) f'(5)=lim 注 (2) 微分係数f'(a) の定義に従って lim h→0 f'(a) で表せ. 解答 (1) lim x-5 =lim 5 =lim 5 =lim h→0 (2) lim h→0 1-5 =5lim f(x)-f(5) x-5 5 h 5f(x)-xf(5) x-5 5f(x)-5f(5) +5f(5)-xf (5) =lim h0 f(x)f(5) x-5 =5f'(5)-f(5) x-5 x-5 5{f(x) f(5) } -f(5)(x-5) x-5 +lim x-5 =limf(a+h)-f(a) h f(a+h) f(a)_(-2)・lim h アルスカ=f'(a)+2f'(a)=3f'(a) Focus x-a x-5 f(a+h)-f(a-2h) h f(a+h)-f(a)+f(a) f(a-2h) -+lim{-f(5)} x-G 5f(x)-xf(5) x-5 h (2) f'(a)=lim -lim h→0 f'(a)=limf(x)-S(α) x-a f(a-2h)-f(a) h →0 f(a+h) f(a-2h) 0 (2) 微分係数 f'(a) の定義に従って lim h-0 て表せ. をf(5) f'(5) で表せ。 (東京薬科大) h f(a+)-f(a) ƒ(a−2h)—ƒ(a) 1-2h (1) 微分係数 f'(a) が存在するとき, 極限値 lim h→0 用いて表せ. f'(a)=limat hod は例題 181 (2)のように, ん ではなく2hになる場合もあるが、2箇所のは同じで、 ん→0のとき→0でないといけない。ただし, lim の下はん→0のままでよい。 また,例題 181 の解答では、次の性質を利用している. (kは定数) lim kf(x)=Alim f(x), lim (f(x) 土g(x))=limf(x) 土limg(x) (複号同順) x-G →ロ x-a x-a **** (防衛大改) x→5のままで考える。 {f(x) f(5)} を作るため に,5f(5) を引いて加える 微分係数の定義 f(a+h) - f(a) を作るため にf(a) を引いて加える、 分子のα-2hに合わせて 分母も2hにし limの 前に2を掛ける. h→0のとき2h 0 ·O)-f(a) f(a+3h) f(a) h f(a-h)-f(a+3h) h をf'(a) を (関西大) をf'(a) を用い Think 例題 (1) (2) (3) 考え方 |解答 Fc 練 1 *

解決済み 回答数: 1