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数学 高校生

赤で囲んでいるグラフのeのt乗はなぜ1番右の写真のようにはならないのですか?🙇🏻‍♀️ お願いいたします🙏

306 第7章 積分法の応用 応用問題 3 xが1<x<e を動くとき f(x)=$'\e-xdt が最小となるようなxの値と,その最小値を求めよ. 精講 式の意味を正しく理解するのが難しい問題です。 まず, インテグラルの中に注目しましょう.tでの積分なので、 れはtの関数と見なければなりません.ここでは,tは変数は定数として ふるまいます。 Textでの分 tの関数(zは定数) ところが,いったん定積分が終わってしまえば,tは消えæだけが残るので これは,xの関数となります。つまり、式全体として見れば,xは変数として ふるまいます。 le-aldt の関数 このように、1つの式の中でを「定数」 と見る視点と「変数」と見る視点 が混在するのです.問題を解くときは,今はどの視点で作業をしているのかを 正しく見分ける必要があります。 解答 xを 1 <x<eを満たす定数と見る. ef-xの 符号は,右図より y=et ≦t≦lox のとき ef-x≦0 e 定数 logx≦1のときe-x≧0 Xx y=x であるから e-x={- -(e-x) (0≤t≤logx) O logx 1 よって •logx e-x (logx≤t≤1) ƒ (x) = ['*** \e'—x\dt+fo«,\e'-x\dt< •logx log.x 積分範囲を分割 = √ * (= (e' - x)} dt + √ (e' - x) dt <***\±F** logx

解決済み 回答数: 1
英語 高校生

(1)が分からないので教えて欲しいです。

5 10 15 20 25 S1 夏期講習 第3講 宿題読解(全クラス共通) 次の英文を読んで、 設問に答えなさい。 There is an old saying in English: "Laughter is the best medicine." Until recently, few people took the saying very seriously. Now, however, (1)doctors have begun to investigate laughter and the effects it has on the human body. They have found evidence (2a)that laughter really can improve people's health. Tests were done to study the effects of laughter on the body. People watched funny films, while doctors checked their heart rate, blood pressure, breathing and muscles. It was found ). It increases that laughter has similar effects to ( 3 blood pressure, the heart rate and the rate of breathing; it also works several groups of muscles in the face, the stomach, and even the feet. beneficial. If laughter exercises the body, it must be Other tests have shown that laughter appears to be capable of ( 4 ) the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group which tolerated the pain for the longest time was the group which listened to a funny The reason why laughter can reduce pain seems to program. be that it helps to produce natural chemicals in the brain (2b)that diminish both stress and pain. There is also some evidence to suggest that laughter helps the body's immune system, that is, the system which fights infection. As a result of these discoveries, some doctors and *psychiatrists in the United States now hold laughter clinics, in which they try to improve their patients' condition by ing them to laugh. They have found that even if feel like laughing, (5)making them ilar to those 文法テキスト宿題 p69 4 問1 下線部(1)をitの内容を明らかにして日本語に訳しなさい。 問2 下線部(2a) (2b)と同じ用法の that を含む文を、次のア~オから それぞれ1つずつ選びなさい。 7. He is the man that lives next door to us. 1. It was such a wonderful movie that I saw it five times. 5. The average price of whisky is higher than that of beer. I. No one told me that he had been ill. *. The fact that she lied made him angry. 問3空所(3)に入れるのに最も適当なものを、次のア~エから1 つ選びなさい。 7. mental powers physical exercise 1. vocal exercise I. a good sleep 問4 空所(4)に入れるのに最も適当なものを、次のア~エから1 つ選びなさい。 7. increasing . reducing 1. producing I. encouraging 問5 下線部(5)を them および those の内容を明らかにして日本語に 訳しなさい。

未解決 回答数: 1