Généralités

Question 1

Somme de q^k

Answer 1

(1-q^n+1)/1-q

Question 2

P parmi N

Answer 2

N! / P!(N-P)!

Question 3

2 parmi N

Answer 3

N(N-1) / 2

Question 4

3 parmi N

Answer 4

N(N-1)(N-2) / 6

Question 5

Triangle de pascal

Answer 5

( N ) = ( N-1 ) + ( N-1 )

P ) ( P-1 ) ( P

Question 6

Binôme de Newton

Answer 6

(A+B)^N
= Somme de 0 à N
P parmi N, A^K, B^N-K