(x,y)关于点燃耐备(0.1)的对称点是(-x,2-y) 2-y = h(-x) y = 2- h(-x) = x +1/x f(x)= x +1/x (2)g(x)=f(x)*x+ax=x^2+ax+1要使g(x)在区间(0.2]上为减函数则皮毁对亩冲称轴方程-a/2≥2即可得a≤-4