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calculati suma lui gauss sumele 1+2+3+...+101 c) 1+2+3+...+199

Răspuns :

1 + 2 + 3 +........ + 101 =
101 * (101 + 1) : 2 =
101 * 102 : 2 =
101 * 51 = 
5151
1 + 2 + 3 + ...... + 199 =
199 * (199 + 1( : 2 =
199 * 200 : 2 =
199 * 100 = 
19900
1+2+3+...+101=101*102:2 =101*51= calculezi tu
1+2+3+...199=199*200:2=199*100=19900