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tea74
@tea74
July 2021
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Четвертое задание А В, пожалуйста
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sedinalana
Verified answer
А
(2-x)(x+19)≥0
x=2 x=-19
_ + _
--------------[-19]------------[2]-----------------
x∈[-19;2]
B
x³-2x²+6x-12≥0
x²(x-2)+6(x-2)≥0
(x-2)(x²+6)≥0
x²+6>0 при любом х
x-2≥0
x≥2
x∈[2;∞)
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sirca
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Answers & Comments
Verified answer
А(2-x)(x+19)≥0
x=2 x=-19
_ + _
--------------[-19]------------[2]-----------------
x∈[-19;2]
B
x³-2x²+6x-12≥0
x²(x-2)+6(x-2)≥0
(x-2)(x²+6)≥0
x²+6>0 при любом х
x-2≥0
x≥2
x∈[2;∞)