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orangeteam
@orangeteam
August 2021
1
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РЕШИТЬ НЕРАВЕНСТВО:
log по основанию 4 (x^2-4x+4) [tex]\leq [/tex] 1-log по основанию 2 (x-1)
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belcatya
(x²-4x+4)≤1-log₂(x-1)
ОДЗ:
x²-4x+4>0
(x-2)²>0
x
2
x-1>0
x>1
Решение:
log₄ (x²-4x+4)≤1-log₂(x-1)
log₂Ix-2I
log₂2-log₂(x-1)
log₂Ix-2I≤log₂(
Ix-2I≤
если 1<x≤2, то
2-x≤2/(x-1)
___-___-1____+___1____-___4___+___x
x ∈ [-1;1) U (1;4]
учитывая ОДЗ, получаем:
Ответ: x∈ (1;2) U (2;4]
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Answers & Comments
ОДЗ:
x²-4x+4>0
(x-2)²>0
x2
x-1>0
x>1
Решение:
log₄ (x²-4x+4)≤1-log₂(x-1)
log₂Ix-2Ilog₂2-log₂(x-1)
log₂Ix-2I≤log₂(
Ix-2I≤
если 1<x≤2, то
2-x≤2/(x-1)
___-___-1____+___1____-___4___+___x
x ∈ [-1;1) U (1;4]
учитывая ОДЗ, получаем:
Ответ: x∈ (1;2) U (2;4]