4d² - d -4d² - 2d = 8
-3d = 8
d = -8/3
d = -2 2/3
-8/3 (-8/3 *4 -1) - 2(-8/3) (-8/3 *2 +1) = -8/3 (-35/3) + 16/3 (-13/3) = 35*8 / 9 - 16*13 / 9 = 280/9 - 208 /9 = 72/9 = 8
Все получается
X(x+1)(x+2)=3333(x+x+1+x+2)
x(x+1)(x+2)=3333*(3x+3)
x(x+1)(x+2)=3333*3(x+1)
x(x+2)=3333*3
x^2+2x-9999=0
D=4+44*9999=40,000=200^2
x>0 ///////////////// x=-2+200/2=99
/ //// / /// / // /// x+1=99+1=100
////////////////////// x+2=99+2=101
сумма этих чисел:
99+100+101=300