(n) 0 1 2 3 4 5 6 7 8 9 (A) 1000 580 433 381,55 363,5425 357,239875 355,0339563 354,2618847 353,9916596 353,8970809 (B) 0 420 567 618,45 636,4575 642,760125 644

(n)

0
1
2
3
4
5
6
7
8
9

(A)

1000
580
433
381,55
363,5425
357,239875
355,0339563
354,2618847
353,9916596
353,8970809

(B)

0
420
567
618,45
636,4575
642,760125
644,9660438
645,7381153
646,0083404
646,1029191

Conjecturer le sens de variation de (A) et (B). Justifier.