Question

Aflati numarul natural n stiind ca :
1<(4•n+3):9< sau = 3

Answer 1

1<(4•n+3):9≤3

1<(4•n+3)≤3·9

1<4•n+3≤27

1<4•n≤27-3

1<4•n≤81

1<n≤20,25
n∈{2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}