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August 2022
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Найдите промежутки монотонности функции и экстремумы
а) у=(х+2)²/(х-1)
б) у=х-4√х
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mikael2
Verified answer
1. y=(x+2)²/(x-1) u= (x+2)² v=x-1
y' = (u/v)'=1/v²[u'v-v'u] =1/(x-1)²[2(x+2)(x-1) - 1*(x+2)²]=
= (x+2)(x-4)/(x-1)²
---------- -2 ----1-------------4--------
+ - - +
функция возрастает х∈(-∞;-2) ∪ (4;∞) убывает x∈ (-2;-1)∪(1;4)
max x= -2 min x=4
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fb17
а функция б? )
mikael2
забыл
NNNLLL54
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Answers & Comments
Verified answer
1. y=(x+2)²/(x-1) u= (x+2)² v=x-1y' = (u/v)'=1/v²[u'v-v'u] =1/(x-1)²[2(x+2)(x-1) - 1*(x+2)²]=
= (x+2)(x-4)/(x-1)²
---------- -2 ----1-------------4--------
+ - - +
функция возрастает х∈(-∞;-2) ∪ (4;∞) убывает x∈ (-2;-1)∪(1;4)
max x= -2 min x=4
Verified answer