Question

determinati cel mai muc numar natural care , impartit la 10 , si restul 9 si impartit la 9 , da restul 8.
va rog e urgent!!​

Answer 1

Răspuns:

n : 10 = c rest 9 => n = 10 × c + 9 |+1 =>

n : 9 = c1 rest 8 => n = 9 × c1 + 8 |+1 =>

=> n + 1 = 10 × ( c + 1)

=> n + 1 = 9 × (c1 + 1)

n + 1 = c.m.m.m.c [10; 9)

n + 1 = 10 × 9

n + 1 = 90

n = 90 - 1

n = 89

______

89 : 10 = 8 rest 9

89 : 9 = 9 rest 8