S₁ = -1 IS₂ = -1+2 5,= -1 + 2-3 S=-1+2-3+4 Sn=-1+2-3+4+...+(-1)" n olduğuna göre, +S2021 kaçtır? 2020 A)-1010 B) -1011 13. C) +1 D) -1
Sagot :
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