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svetuk2102
@svetuk2102
July 2022
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Tka11
1. Б) Log 1/2(3x-5)=-1
(3x-5)=2
3x=7
X=7/3
В) Log 2( x2–3x)=2
X2-3x=4
X2-3x-4=0
Д= 9-4*1*(-4)= 9+16= 25
Х1= 3+5/2 Х2=3-5/2
Х1= 4 Х2=-1
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Answers & Comments
(3x-5)=2
3x=7
X=7/3
В) Log 2( x2–3x)=2
X2-3x=4
X2-3x-4=0
Д= 9-4*1*(-4)= 9+16= 25
Х1= 3+5/2 Х2=3-5/2
Х1= 4 Х2=-1