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zheka1289
@zheka1289
August 2022
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[Алгебра] Решите уравнение :
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sedinalana
Ответ: x=0
1 votes
Thanks 3
KpekepLOL
а че значит знак ^?
zheka1289
это степень
KpekepLOL
понятно,спасиьо
Hilola03
Это означает в степени
AnonimusPro
Verified answer
3/5*5^2x-2/5*5^x=1/5
3*5^2x-2*5^x-1=0
5^x=t
3t²-2t-1=0
D=4+12=16
t1=(2-4)/6=-1/3⇒5^x=-1/3 нет решения
t2=(2+4)/6=1⇒5^x=1⇒x=0
3 votes
Thanks 3
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Answers & Comments
Ответ: x=0
Verified answer
3/5*5^2x-2/5*5^x=1/53*5^2x-2*5^x-1=0
5^x=t
3t²-2t-1=0
D=4+12=16
t1=(2-4)/6=-1/3⇒5^x=-1/3 нет решения
t2=(2+4)/6=1⇒5^x=1⇒x=0