n dan—1 2.3....n (dx dx

F(X)= F(a)+ [ F'(x) de =

—= F(a) +1 F'(a)+ (a) +- vdF’(a9(@)., » æF (ao)

2 da 2.3 da?

nn dn—1 p" (a) op" (a) (= 1} Xqn (æ'— a 19 (æ”)}" F' (æ'!) ms 2.8...n da'"—1 E 2.8...n [ (dæ'"}" dx.

Ainsi l’on parvient à la série de Lagrange 2 dF" (a)?

F(X)=F(a)+1nF (a)p(a) +00 + md? F"(a) g* (a) n° __ an F" (a) p" (a)