ES

m (in — 1) (m — 2) am n (ne — 1) (me — 2) (in —3) b5 +

1, 2. 3 ai 1. 2. 3. 4

am on (on — 1) (on — 2) (on — 3) (on — 4) am me Dh 4 mmemnnreme ammmmtmmmemenmmnce me DO Ge. at 1, 2, 3, 4,5 aÿ

ou mb m(m—1)

(a + by" = d" (1 ER l'a. 1, 9 2

om (m —-1) (or —2) 03 on (ne — 1) (m0 — 2) (on — 3} + +

om (on — 1) (me — 2) (nm — 3) (me -— 4) L5 a nDE, EDR Sn ps on NU à (P).

Applications de cette formule,