bonjour
1 ) 3² = 9
7 ² = 49
on donne A = 2
B = 1/2 x ( 2 + 2/2) = 1/2 x 3 = 3/2
C = 1/2 x ( 3/2 + 2 : 3/2 )
= 1/2 x ( 3/2 + 2 x 2/3)
= 1/2 x ( 3/2 + 4/3 )
= 1/2 x ( 9/6 + 8/6 )
= 1/2 x 17/6
= 17/12
D = 1/2 x ( 17/12 + 2 : 17/12)
= 1/2 x ( 17/12 + 2 x 12/17)
= 1/2 x ( 17/12 + 24 /17 )
= 1/2 x ( 289/104 + 288/104)
= 1 /2 x 577/104
= 577/208
le reste à la calculatrice , tu as D de calculé