Question

Afla suma resturilor împărțirilor tuturor nr naturale x la numărul 3, unde 10<x mai mic sau egal cu 20! PLS HELP!!!

Answer 1

11/3=3 rest 2
12/3=4 rest 0
13/3=4 rest 1
14/3=4 rest 2
15 rest 0
16 rest 1
17 rest 2
18 rest 0
19 rest 1
20 rest 2
S=11

Answer 2

x∈{11,12,13,14,15,16,17,18,19,20};
Fie r-restul;
$r_0=2;r_1=0;r_2=1;r_3=2;r_4=0;r_5=1;r_6=2;r_7=0;$$r_8=1;r_9=2;$.Astfel:2+0+1+2+0+1+2+0+1+2=11