Răspuns:
Explicație pas cu pas:
x(1 + 2 + 3 +....+ 50) - 2y = 0
1 + 2 + 3 + ...+ 50 = 50*(1 + 50)/2 = 50*51/2 = 1275
1275x - 2y = 0
--------------------
x - 2x + 3x - 4x + ......+ 49x - 50x + 8y = 0
x(1 - 2) + x(3 - 4) + ....+ x(49 - 50) + 8y = 0
-25x + 8y = 0
____________
Sistemul devine
1275x - 2y = 0 (inmultim cu 4)
-25x + 8y = 0
5100x - 8y = 0
-25x + 8y = 0
x(5100 - 25) = 0
x = 0
y = 0
