Question

Calculați: b) 1+2+3+....+180 va rogg​

Answer 1

suma lui Gauss

(1+180) x 180 : 2
181 x 90
16290

Answer 2

Se realizeaza cu suma gauss:

$\frac{n + (n + 1)}{2}$

Deci va fi

$\frac{180 \times (180 + 1)}{2} = \frac{180 \times 181}{2} = \frac{32.580}{2} = 16.290$