Question

Calculati:
(1+2+3+4+5+6+.........+2014):2015​

Answer 1

Răspuns:

(1+2+3+4+ ... + 2014) : 2015=

=$\frac{2014*2015}{2}$ : 2015= 1007*2015 / 2015= 1007

Answer 2

$\it (1+2+3+\ ...\ +2014):2015=\dfrac{2014\cdot2015}{2}\cdot\dfrac{1}{2015}=1007$