решите логарифмические неравенства с одз (осн.-основание)
1)log(осн.)2 (4x+5)=log(осн)2(9-2х)
2)log(осн)3 (x^2-5x-23)=0
3)lg(5x-4)=log(1-х)
4)lg(5x-4)=log(осн)10(1-х)
5)lg(осн)1/3(x^2+3x-9)=-2
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