题目内容
求下列各式中的x.
(1)2logx8=3
(2)3x+1=6
(3)logx2=5
(1)x=4
(2)x=log32
(1)=-; (2)logx5=; (3)log(x-1)(x2-8x+7)=1.
(1);
(2);
(3).