Ответ:
1) – х < 10
-1×(-x)>-1×10
x>-10
2) -10x+25<0
(x-5<0
x∈∅
3)(x-3,7)×(2-x)≥0
(x-)×(2-x)≥0
x-≥0}
2-x≥0
x-≤0}
2-x≤0
x≥}
x≤2
x≤}
x≥2
x∈(2,)
Відп: x∈(2,)
4)9х-4(2х+1)>-8
9x-8x-4>-8
x-4>-8
x>-8+4
x>-4
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Answers & Comments
Ответ:
1) – х < 10
-1×(-x)>-1×10
x>-10
2) -10x+25<0
(x-5<0
x∈∅
3)(x-3,7)×(2-x)≥0
(x-)×(2-x)≥0
x-≥0}
2-x≥0
x-≤0}
2-x≤0
x≥}
x≤2
x≤}
x≥2
x∈∅
x∈(2,)
Відп: x∈(2,)
4)9х-4(2х+1)>-8
9x-8x-4>-8
x-4>-8
x>-8+4
x>-4