Log2(x^-3)=2
x^-3=2^2
x^-3=4
x=1/2^(2/3)
log2(x^2-3x)=2
x^2-3x=4
x^2-3x-4=0
d=9+16=25
x1,2=(3+-5)/2
x1=4 x2=-1
Ответ:(4:-1)
lg(x^3)-lg(x+3)=lg(2x^2)-lg(5x+3)
lg(x^3/(x+3))=lg(2x^2/(5x+3))
x^3/(x+3)=2x^2/(5x+3)
x^3(5x+3)=2x^2(x+3)
5x^4+3x^3=2x^3+6x^2
5x^4+x^3-6x^2=0
x^2(5x^2+x-6)=0
1)x^2=0
x=0
2)5x^2+x-6=0
d=1+120=121
x1,2=(-1+-11)/10
x1=1 x2=-12/10=-6/5
Ответ:1
log2(3-х)+log2(1-x)=3
log2(3-x)(1-x)=3
(3-x)(1-x)=2^3
3-x-3x+x^2=8
3-4x+x^2=8
x^2-4x-5=0
d=16+20=36
x1,2=(4+-6)/2
x1=5 x2=-1
Ответ:-1
log4(log2(log3(2x-1)))=0,5
log2(log3(2x-1))=4^0,5
log2(log3(2x-1))=2
log3(2x-1)=2^2
log3(2x-1)=4
2x-1=3^4
2x-1=81
2x=82
x=41
Ответ:41