Question

Se considera nr rational A=3n+2/16, unde n apartine N
A) determinati cel mai mic nr natural pt care A>3/8
B) determinati suma tuturor nr naturale n pt care A<10

Answer 1

Răspuns:

2

1378

Explicație pas cu pas:

• (3n+2)/16>3/8=6/16

3n+2>6

3n>4

n≥2

• (3n+2)/16<10=160/16

3n+2<160

3n<158

n<158/3=52si2/3 si n∈N0+1+2+...+52=52*53/2=26*53=1378