y equals log Subscript b Baseline x is equivalent to the exponential form x Superscript b Baseline equals y comma y Superscript x Baseline equals b comma b Superscript y Baseline equals x comma x Superscript y Baseline equals b comma b Superscript x Baseline equals y comma y Superscript b Baseline equals x comma xgreater than0, bgreater than0 and bnot equals1