Question

Rezolvarea exercitiilor cu numere reale:
1. x=1+2+3+...+120+2×242
2. x=3(1+3+5+...+99)-5000
3. x=2+4+6+...+10-25×2

Answer 1

1. x= (120*121)/2 + 2*242
x=60*121 + 2*2*121
x=121(60+4)
x=121*64
x=11 ^ 2 * 8 ^ 2
x= 88 ^ 2