Răspuns :
x(1+2+3+...+2009)=-4018
x*2009*2010/2=-4018
x*2009*1005=-4018/ :2009
x*1005=-2
x=-2/1005
sper ca te-am ajutat!
x*2009*2010/2=-4018
x*2009*1005=-4018/ :2009
x*1005=-2
x=-2/1005
sper ca te-am ajutat!
x+2x+3x+.....+2009x=-4018x(1+2+3+...+2009)=-4018
x·2010·2009/2=-4018
x·1005·2009=-4018
x=(-2·2009)/(1005·2009)
x=-2/1005
x·2010·2009/2=-4018
x·1005·2009=-4018
x=(-2·2009)/(1005·2009)
x=-2/1005