Progression arithmetique Flashcards

1
Q

Somme des termes d’une suite arithmétique

A

1/2 x ( 1er terme + dernier terme ) x nombre de termes

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2
Q

Somme des N premiers entiers naturel

A

N x (N+1) / 2

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3
Q

Somme arithmétique

A

Un = UO + n x r

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4
Q

Nombres entre B - A + 1 (A et B inclus)

Ex. entre 3 et 12

A

B-A+1

Réponse : 10 nombres

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