(1)
log2[log5(x)]=2
则log5(x)=2^2=4
x=5^4=625
(2)
log2x^2-1(3x^2+2x-1)=1
则3x^2+2x-1=2x^2-1
x^2+2x=0且3x^2+2x-1>0
解得:x=-2
(3)
log5[log2(lnx)]=0
则log2(lnx)=5^0=1
lnx=2
x=e^2
.
(1)
log2[log5(x)]=2
则log5(x)=2^2=4
x=5^4=625
(2)
log2x^2-1(3x^2+2x-1)=1
则3x^2+2x-1=2x^2-1
x^2+2x=0且3x^2+2x-1>0
解得:x=-2
(3)
log5[log2(lnx)]=0
则log2(lnx)=5^0=1
lnx=2
x=e^2
.