Question

1918 plus 1919 plus 1920 plus puncte puncte puncte plus 2018. Multumesc

Answer 1

$S = 1918+1919+1920+...+2018 \\\\ S = 1918+(1918+1)+(1918+2)+...+(1918+100) \\ \\ S = 1918\cdot 101+1+2+3+...+100\\ \\ S = 1918\cdot 101+\dfrac{100\cdot 101}{2} \\ \\ S = 1918\cdot 101+50\cdot 101 \\ \\ S = 101\cdot (1918+50) \\ \\ S = 101\cdot 1968 \\ \\ S = 198768$

Answer 2

Răspuns:

S=(1918+2018)×101/2=3936×101/2=198768; SUMA LUI GAUSS

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