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Sume gauss 7+16+25+34...+862
54+63+72+81...+675
37+43+49+55....+103


Răspuns :

Răspuns:

A) (862-7):9+1=855:9+1=95+1=96(termeni)

(862+7)x96:2=869x48=41712(suma)

B) (675-54):9+1=621:9+1=69+1=70(termeni)

(675+54)x70:2=729x35=25515(suma)

C) (103-37):6+1=66:6+1=11+1=12(termeni)

(103+37)x12:2=140x6=840(suma)