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a fost răspuns

Calculați:

(2+4+6+...+2018)-(1+3+5+...+2017)

Răspuns :

Eduardstefanel

Răspuns:

[(1+2+3+...+2018)-(1+3+5+...+2017)]-[(1+2+3+...+2017)-(2+4+6+...+2018)]

=(2018×2019:2) - (2018×2019:2)

=(1009×2019) - (1009×2019)

=0

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