(I)求函数f(x)的定义域;
(Ⅱ)判断f(x)的单调性;
(Ⅲ)若m满足f(1﹣m)≥f(1﹣m2),求m的范围.
(Ⅰ)求函数f(x)的定义域;
(Ⅱ)判断函数f(x)的奇偶性,并加以证明;
(Ⅲ)设a= ,解不等式f(x)>0.