Răspuns:
972
Explicație pas cu pas:
9x{8+7x[6+5x(4+3x(2+1))]} : (1+2+3+...+9)=
9x[8+7x(6+5x(12x3))] : (1+2+3+...+9)=
9x[8+7x(11x36)] : (1+2+3+...+9)=
9x(8+7x396)] : (1+2+3+...+9)=
9x(15x396) : (1+2+3+...+9)=
9x5940 : 55=
9x108=
=972
Explicatia ecuatiei (1+2+3+...+9)
S=1+2+3+...+(n-1)+n=nx(n+1):2
1+2+3+...+9+10=10x(10+1):2
S=10x11:2
S=110:2
S=55
