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Calculati : [tex] \sqrt{2(1+2+....+200)+201} [/tex]

Răspuns :

Enashraluk
 1+2+....+200 = [tex] \frac{200*201}{2} [/tex] = 100*201
[tex] \sqrt{2*100*201+201} = \sqrt{40200+201} = \sqrt{40401} = 201[/tex]

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