Question

Va rog Calculați:
S2=-2-4-6-….-98-100
Va roggg

Answer 1

S2 = -2 - 4 - 6 -...-98-100

S2 = -2(1+2+3+...+50)

S2 = -2*(50*51)/2 (simplifici 2)

S2 = -(50*51)

S2 = -2550