Question

buna! ma puteti ajuta cu acest exercitiu? multumesc!

Answer 1

$A=3+33+333+...+33...3~|*3\\ \\ 3A=9+99+999+...+999...9~|+6\\ \\ 3A+6=10+100+1000+...+1000000=1111110~(6~de~1~si~un~0)\\ \\ A=\frac{1111110-6}{3} =\frac{1111104}{3}=370368$