1
3^(x-1)=3^x/3=1/27
3^x=1/9=3^(-2)
x=-2
log3(x²-1)=1
3^1=x²-1,x=+-2
2,
由对数函数单调性
a>1,函数单调递增,00不等于1)
(1)4/(-2/3)*a^[2/3-(-1/3)]*b^[-1/3-(-4/2)]
=-6ab^(5/3)
(2)log4[2^5*4^(-2)]=log4(2^1)=log4[4^(1/2)]=1/2
(3)log3(2)-log3(32/9)+log3(8)-5^[log5(3)]
=log3[2/(32/9)*8]-3
=log3(9/2)-3
=2+log3(2)-3
=-1+log3(2)