(x,y)关于点(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
则对称轴方程-a/2≥2即可
得a≤-4
(x,y)关于点(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
则对称轴方程-a/2≥2即可
得a≤-4