👤

REZOLVATI EXERCITIILE
1) 6+7+8+....................+100
2) 10+11+12+.................+110
3) 31+32+33+..................+2017
REPEDE VA ROGG❤❤❤


Răspuns :

1) (100-6)÷1(ratia)+1=94+1=95 termeni
6+7+...+100=[95×(100+6)]÷2
6+7+...+100=(95×106)÷2
6+7+...+100=95×53=5035
2) (110-10)÷1+1=100+1=101 termeni
10+11+...+110=(101×120)÷2
10+11+...+110=101×60=6060
3) (2017-31)÷1+1=1986+1=1987 termeni
31+32+...+2017=(1987×2048)÷2
31+32+...+2017=1987×1024=2034688

Sper ca te-am ajutat! :)))