我修改过了……a=log18(9)b=log18(5)log36(5)=log18(5)/log18(36)=log18(5)/[log18(18)+log18(2)]=log18(5)/{log18(18)+[log18(18)-log18(9)]}=log18(5)/{1+[1-log18(9)]}将a=log18(9)b=log18(5)代入所以log36(5)=b/...