已知a^(2/3)=4/9(a>0),则log(2/3)a=?
问题描述:
已知a^(2/3)=4/9(a>0),则log(2/3)a=?
答
a^(2/3)=4/9→log(2/3)[a^(2/3)]=log(2/3)[(2/3)^2]→2/3*log(2/3)a=2→log(2/3)a=3
已知a^(2/3)=4/9(a>0),则log(2/3)a=?
a^(2/3)=4/9→log(2/3)[a^(2/3)]=log(2/3)[(2/3)^2]→2/3*log(2/3)a=2→log(2/3)a=3