Предмет: Алгебра, автор: koreyska

1. Решить неравенства:
а) 22х+5 ≤ 3(6х-1)
б) х^ -11х+24<0

2. При каких значениях параметр р уравнение, не имеет корней.
х^ +2рх - 7р = 0

Подробно пожалуйста.

Ответы

Автор ответа: Аноним
2
1
а) 22х+5 ≤ 3(6х-1)
22x-18x≤-3-5
4x≤-8
x≤-2
x∈(-∞;-2]
б) х² -11х+24<0
x1+x2=11 U x1*x2=24⇒x1=3 U x2=8
x∈(3;8)
2
х²+2рх - 7р = 0
D=4p²+28p<0
4p(p+7)<0
p=0 p=-7
p∈(-7;0)


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