Liân-só-lu̍t (Hàn-jī : 連鎖律, Eng-gí: chain rule), sī the̍h lâi kiû ho̍k-ha̍p-hâm-sò͘ (複合函數) ê tō-sò͘ (導數) ê 1 ê bî-chek-hun hoat-chek.

Siat-tēng: , tiō ū:

,

kî-tiong --ê tō-sò͘.