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Sagot :

Bonjour,

1)

4, 8, 12, 16 , 20

5,10, 15, 20, 25

2)

a=

3/4 * 5/5 + 7/5 * 4/4

= 15/20 + 28/20

= 43/20

b=

2/5 * 4/4 + 5/4 *5/5

= 8/20 + 25/20

= 33/20

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