Réponses

2013-05-26T18:59:04+02:00

a)
456 = 8 x 3 x 19
987 = 3 x 7 x 47

 

PPCM(456,987) = 8x3x7x19x47 = 150024

 

b)
369 = 9 x 41
741 = 3 x 13 x 19

 

PPCM(369,741) = 9 x 13 x 19 x 41 = 273429

2013-05-26T19:09:36+02:00

456 = 2x 2 x 2 x 3 x 19 

987 = 3 x 7 x 47 

 

PPCM = 2 au cube x 3 x 7 x 47 = 7896 

 

 

369 = 3 x 3 x 41 = 3² x 41 

741 = 3 x 13 x 19 

 

PPCM = 3² x 13 x 19 x 41 = 91 143