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数学 高校生

FOCUS GOLD182 ☆マークをつけた最後の方のところ、なぜこの条件式のようになるのか分かりません。 教えてください🙇‍♀️

*** の範囲を定めよ. 商の微分 (分母)=(x2-4) > 0 より (分子) の符号 を考える. 2次方程式 ① が異な る2つの実数解をも (x-2)20 x≠±2 である解を 極せない. (x+2)²=0 x≠±2 である解を もたない. このときの解は x=±2 x=-a±√a²-4 で極値をとる. Check 例題 182 極値をもつ条件(2) aを正の定数とし, f(x)=x-alog(x+1) とする. s/1) 関数f(x) の定義域を求めよ。 (3) f(x) がただ1つの極値をもつとき,定数aの値の範囲を求めよ (大阪工業大 ) 考え方 増減表をかいて考える.ただ1つの極値をもつための条件は,f'(x) = 0 を満たし、 の前後で、f(x)の符号が変わるxの値がただ1つ存在することである。 (1) 真数条件より x+1>0数分解 したがって, (x+1)(x²-x+1)>0 より x>1 x²x+1 3x² _x03-3ax2+1 (②2) f'(x)=1-ax+1 x3+1 (3)x>1 のとき, x+1>0 であるから, (2)より g(x)=x-3ax2+1 とおくと, f'(x)とg(x) の符号 は一致するので, f(x) がただ1つの極値をもつため の条件は,x> -1 において, g(x)=0 を満たし, そ の前後で g(x) の符号が変わるxの値がただ1つ存 在することである. g'(x)=0 とすると, したがって、キス g'(x)=3x²-6ax=3x(x-2a) 関数の増減 より次のようになる. (-1)... 0 + 0 詞より。 (2) 導関数f'(x) を求めよ。 これを解くと, 2a lg'(x) 0 + 1-4a³ 7 g(x) (30) 71 lim_g(x)=3a < 0, g(0) =1>0よりx>1 に x = 0.2a g(x)の増減表は における x-1+0 f(x) が極値をもつxの値がただ1つあるための条件は、 g(2a)=1-4a³≥0 1-4a²0 - 1x (1-√√a)(1+√4a+√4²a²) ≥0 a>0より, *** 0<a≤ 2 -3a + g(x) 3+1 f'(x)= x+1>0 より, g(x) の符号を考える. y=g(x) /60 2a 393 -1<x<0 で,g(x) は単調増加である. g (2a) ≧0のとき, 題意を満たすxの値は, |x=b(-1<b<0) のみ となる. 1+√√4a +4²a²>0 第6章

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英語 高校生

答えが無くて、あってるかどうか添削してください

① ( )内から最も適切な語句を選び,○で囲みなさい。 1. She had her mother (pack / packed) some sandwiches. 2. I hate (his/he) being treated like that. his 3. I'm sorry for (not going / going not) to the party. 4. He is proud of (buying / having bought) the house when he was young. 5. I heard the birds (to sing / singing). 2( 内に入る最も適切な語句を選び, 番号を○で囲みなさい。 1. Dad, if my grades improve by the end of the term, would you mind ( 34678 2 locking ) by my nickname. raising 2 rising 3 to raise 4 to rise 2. "I'd better call our neighbor to ask her to check the door of our apartment." "You don't have to do that. I remember ( ) it when we left." 1 lock 3 to be locked 3. I like ( 1 call 1 allowed 2 being called 4. "Our trip to Tokyo was fun, wasn't it?" "Yes, it was great! I'm really looking forward ( 1 go 2 going 3 5. "Do you still plan to go to Hawaii this winter vacation?" "Yes, and I wish you'd consider ( ) with me." 1 go 2 going 3 to go 6. If the pain in your throat becomes worse, have it ( 2 checking 1 check 3 to check 7. Although her parents had said "no" for a long time, they finally ( alone. 3 to call ->>> 1 2 5 8 10 ) at once. ) my allowance? 〔センター試験〕 4 to lock 4 calling ) there again sometime." [センター試験〕 to go 4 to going 4 to going [センター試験〕 4 checked 4 made 〔センター試験〕 [センター試験] ) her go to Europe 〔センター試験〕 2 got 3 let 3 ( 内の語句を並べかえて, 意味の通る文にしなさい。 1. I was thinking of the speech (called, I had to, make, my name, when I heard ). [センター試験] I was thinking of the speech I had to make when, I heard 2. If we want to (English, in, make, ourselves, understood ), we need not only good language skills but also clear thinking and a broad general knowledge. If we want to make ourselves understood in English language skills but also clear thinking and a broad general knowledge. [センター試験] we need not only good 02.01

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英語 高校生

至急❗️答えが合っているか見ていただきたいです🙇 よろしくお願いします

5) (6) (7 (8 (9 50 LESSON 13 Choose (bammolni Encame\\ probare veng hyppor\2262720109 bas Juode) zaronial 1 Choose the best answer to fill in the blanks. (1) (1) There was ( ) audience at the movie theater. Da large 3 many 2 large (4) As I had a bad cold, I was made ( 1 take (2) Always keep a bucket of water handy, ( 1 unless in case of (3) My teacher recommended several books to the class, ( 1 that A 2 which (5) Someone hit me on 1 a (7) I am sure ( 1 not his (8) The girl ( 1 who helle ) fire. 3 to prepare (10) To begin ( 1 at (12) 157 (nodw\ jol 3 one of that 2 to take to take the time. 861 (6) The picture is said (dule) just before he died. 3 be taken having been drawn check my smart2 to be drawn 3 to have been drawn 4 to have drawn (11) This restaurant is ( (1) more (千葉工業大) (四天王寺国際仏教大) 4 his t me on (r) head. an\ayab\board blood) best Foob slijpst 2 an 3 the ) coming to the party. 2 his not 共立女子 ibidezog\mobsent\mont Vi word ) the bitter medicine against my will. 4 taking (9) It is only 6 o'clock in the morning. She ( 1 may still asleep 3 may be sleeping 3 of his not 4 much bit of 4 ready on ) has become a one of which ), you must buy an admission ticket. 2 on with KURSE 4 of not his blan) at this time. 2 might have been sleeping 4 might still asleep ) sweet voice John loves is a good singer. aviah Lotus A 2 what 3 which whose bestseller. 4 from ) nicer than the one I visited last week. 2 too 3 as 4 far (関西学院大) AS (13) Some of the milk turned sour before it reached the market and ( 1 must throw 2 have to be thrown 3 had to throw had to be thrown (近畿大) THIOS (ALLE) (大阪経済大) ) that such a thing would happen to all of the guests staying at the hotel. Little did I dream 2 Little dream did I 3 Little I did dream 4 Little dream I did away. (神奈川大) (奈良) 2 (東邦) (清泉女子大 (1) (芝浦工業大) (2) (3 (²

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