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Rezolvam mai intai suma:

1 + 3 + 5 + ... + 2019 = 1 + 3 + 5 + ... + (2 · 1010 - 1) = 1010²

$a=\sqrt{(2020-\frac{1010}{\sqrt{1010^{2}} } )^{2019} :2019$

$a=\sqrt{(2020-\frac{1010}{1010} )^{2019} :2019$

$a=\sqrt{(2020-1 )^{2019} :2019$

$a=\sqrt{2019^{2019} :2019$

$a=\sqrt{2019^{2018}$

a=2019^{1009}a=2019
1009​