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已知,求:
(Ⅰ)的值;
(Ⅱ)的值;
(Ⅲ)的值.
求x的值:(1)logx2=;(2)logx=-.
求x的值:(1)log3x=;(2)log2x=;(3)log(3x2+2x-1)=1;(4)log2[log3(log4x)]=0.