Question

Cate numere naturale de forma abcd exista,care sa indeplineasca conditia:a +b+c=d,unde d<4.

Answer 1

A={0, 1} B={0,1} C={0,1}

Answer 2

a+b+c=d<4⇒d=[3,2,1];
⇒a+b+c=3⇒abc=[111,102,120,201,210,300];
⇒a+b+c=2⇒abc=[101,110,200];
⇒a+b+c=1⇒abc=[100];
⇒6+3+1=10 numere care indeplinesc conditiile problemei;