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keffeben
@keffeben
July 2022
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Решите пожалуйста log0,2 (4x+7) = -2
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Lesben
Verified answer
Log0,2 (4x+7)=-2 , x bolše čem -7/4
4x+7=(0,2)ˇ(-2)
4x+7=(1/5)ˇ(-2)=5²
4x+7=25, 4x=25-7, 4x=18,
x=18:4, x=4,5
Otvet: x=4,5
( log0,2(18+7)=log0,2 25=-2)
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Answers & Comments
Verified answer
Log0,2 (4x+7)=-2 , x bolše čem -7/44x+7=(0,2)ˇ(-2)
4x+7=(1/5)ˇ(-2)=5²
4x+7=25, 4x=25-7, 4x=18,
x=18:4, x=4,5
Otvet: x=4,5
( log0,2(18+7)=log0,2 25=-2)