l(f)ʽF(xin)NϱF(xin)
κεOֻҪʹöгF(xin)ϵĕrl(f)ʽҲȻÑl(f)F(xin)POҲ̫҂́ҷһЩ׳F(xin)Ĺφ}ԼŲͽQأ
1ض̫
l(f)ʽضӰܕF(xin)^׃@N׃Dzɿصһ҂l(f)F(xin)ĜضȺܸ~rǶsˮÑԓrzysˮǷԼrȱˮĜض^ҲɟύQF(xin)}@r҂ҪksˮЧĽQkǽol(f)ʽOúϵy(tng)նȣֻҪOĸȺնOںmķôͲ׳F(xin)ض^ߵrˡ
2ض̫
@Nr҂Ҫעzl(f)ʽϵy(tng)е䄩䄩ˣͲҪ̫sˮĜض̫䌍ҲǺˮPϵ^@rҪضȁ{mˮr
3Oˮ̫
l(f)ʽF(xin)ˮԓձĆ}ÑƽrʹOĕrҪעֹˮĮafsˮкдĶ|ĕrˮӲȾ׃@Nr³F(xin)ˮĿҲܴ