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valeriyakustova
@valeriyakustova
July 2022
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Решить неравенство:
[tex] log_{3} (x^{2} -4x) \leq log_{3} (x-6)[/tex]
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Evgenia4836
Verified answer
ОДЗ:
x²-4x>0
x>6
x∈(-∞;0)∪(4;+∞) и (6;+∞)
объединяем и получаем одз x∈(6;+∞)
x²-4x≤x-6
x²-5x+6≤0
D=25-24=1
x1= (5+1)/2= 3
x2=(5-1)/2= 2
(x-3)(x-2)≤0
x∈[2;3] согласно ОДЗ решений нет. x∈∅
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Answers & Comments
Verified answer
ОДЗ:x²-4x>0
x>6
x∈(-∞;0)∪(4;+∞) и (6;+∞)
объединяем и получаем одз x∈(6;+∞)
x²-4x≤x-6
x²-5x+6≤0
D=25-24=1
x1= (5+1)/2= 3
x2=(5-1)/2= 2
(x-3)(x-2)≤0
x∈[2;3] согласно ОДЗ решений нет. x∈∅