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Exalibur4ik
@Exalibur4ik
July 2022
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sedinalana
1
2
a)x²-81≥0
(x-9)(x+9)≥0
x=9 U x=-9
x∈(-∞;-9] U [9;∞)
b)x∈R (степень нечетная)
3
2 votes
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Answers & Comments
2
a)x²-81≥0
(x-9)(x+9)≥0
x=9 U x=-9
x∈(-∞;-9] U [9;∞)
b)x∈R (степень нечетная)
3