Explications étape par étape:
50) a = -7/6 × 4/3 = -28/18 = -14/9
b = 3/7 × 4/-3 = 12/-21 = 4/-7
c = -5/9 × 3/-8 = -5/3 × 1/-8 = 5/24
51) a = 1/5 × 1/-3 = 1/-15
b = 3/8 × -1/6 = -3/48 = -1/16
c = -15/8 × 1/5 = -3/8 × 1 = -3/8
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Explications étape par étape:
50) a = -7/6 × 4/3 = -28/18 = -14/9
b = 3/7 × 4/-3 = 12/-21 = 4/-7
c = -5/9 × 3/-8 = -5/3 × 1/-8 = 5/24
51) a = 1/5 × 1/-3 = 1/-15
b = 3/8 × -1/6 = -3/48 = -1/16
c = -15/8 × 1/5 = -3/8 × 1 = -3/8