Предмет: Алгебра, автор: Аноним

Алгебра. Даю 100 балів. потрібно вирішити завдання з максимальним поясненням щоб було усе зрозуміло будь ласка.

з дуже детальним поясненням будь ласка

Приложения:

Ответы

Автор ответа: ludmilaksenija2005
1

Объяснение:

1.

у=3/(х³-3х²)

х³-3х²≠0

х²(х-3)≠0

х²≠0 х-3≠0

х≠0 х≠3

ответ: 0 ; 3

2.

у=х+3

у=4/х

х+3=4/х ; х≠0

х(х+3)=4

х²+3х-4=0

D=3²-4•1•(-4)=9+16=25

x1=(-3+5)/2=1

x2=(-3-5)/2= -4

x≠0

y1=4/1=4

y2=4/(-4)= -1

точки пересечения: (1;4) и (-4;-1)

3.

у=х²-6х+5 парабола ветви направлены вверх

xo= -b/2a

xo= -(-6)/2•1=3

Так как ветви направлены вверх,то функция убывает на промежутке (-∞;3]

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