ɶС_l(f)˾I(y)ҕlƬI(y)չʾֶ
I(y)ҕlƬfõܴռ
һϿ͑ҵңُ^҂ĂƬƽ_ϵy(tng)Ŀǰأһ͑һҕlƬĿ͑ƬҕlʽչF(xin)ҪƬдĂҕlI(y)ҕlҕlͮa(chn)Ʒҕlͨ^ҕlķʽչʾI(y)
ҬF(xin)ڰl(f)F(xin)˶׃ԽԽУÈDƬҕlQĆ}ԛQ֡@ӵ҂߀˺ܶ࣬ԺԳm(x)ҷ
һƪ:һƪɶ~С_l(f)ƹ˾һһa͑ܵrֵ
һƪ:һƪɶcС_l(f)ҪX
YӍ