MULTIPLES ET DIVISEURS

N N {0 ; 1 ; 2 ; 3 . . . }

Z Z {. . . , −3,−2,−1,0 ; 1 ; 2 ; 3 . . . }

a b

k a =kb

b|a

24 = 1 ×24 = 2 ×12 = 3 ×8 = 4 ×6

? b a b 6= 0 a

? a a |a a |0 1 |a

? b |a a 6= 0 |b|≤|a|

? b |a a |b a =b a =−b

a b c

c|b b |a c |a

c|b ca |ba

c|a c |b c |a+b c |a−b c |au +bv

u v

n2−1

n3−1

a b d

7a+ 5b4a+ 3b d a

b d

x−3x2+ 3

x2+ 3 (x−3)(x+ 3) + 12

x−2x+ 5

x+ 7 2x+ 15

x−1x2

x+ 1 x3+ 2

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