Răspuns :
Răspuns:
Explicație pas cu pas:
1 + 2 + 3 + ...+2018 = 2018*(1 + 2018)/2 = 2018*2019/2
2*2018*2019/2 = 2018*2019
n = 2019 + 2018*2019 = 2019*(1 + 2018) = 2019*2019 = (2019)^2 patrat perfect
Răspuns:
Explicație pas cu pas:
1 + 2 + 3 + ...+2018 = 2018*(1 + 2018)/2 = 2018*2019/2
2*2018*2019/2 = 2018*2019
n = 2019 + 2018*2019 = 2019*(1 + 2018) = 2019*2019 = (2019)^2 patrat perfect