Question

alfa valoarea lui x :. 2+4+6+..........+98+x=1+2+3+4+5+......99. ajutatima va rog

Answer 1

2+4+6+..........+98+x=1+2+3+4+5+......99
2(1+2+3+...+49)+x=99×100/2
2×49×50/2+x=99×100/2
49×50+x=99×50
x=99×50-49×50
x=50(99-49)
x=50×50
=2500