记g(x)＝(2x－a)(a－x)^2,(a>0),则g'(x)＝2(x－a)(3x－2a),令g'(x)＝0,则x＝a,或x＝2/3*a,因为a＞0,所以a＞2/3*a,所以不等式g'(x)＞0的解集为{x|x＜2/3*a,或x＞a},则原函数的单调增区间为(－∞,2/3*a)和(a,＋∞),单...