Question

cum se calculeaza : (2x3x4+4x6x8+6x9x12+........+24x36x48 ) : (1x2x3+2x4x6+3x6x9+.......+12x24x36)=?

Answer 1

(1×2×3)+2(1×2×3)+3(1×2×3)+...............+12(1×2×3) Si dai factor comun (1×2×3): (1×2×3)×(1+2+3+.....+12) si calculezi cu suma lui gause (1×2×3)×(12×13:2) (1×2×3)×(6×13) (1×2×3)×78 6×78 468 Si asa calculezi si prima paranteza ,iar apoi le imparti