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S= 3+5+.....4033
sa se afle S


Răspuns :

S+1 = 1+3+5+.........+4033
S1 = 2+4 + 6 +........+4032= 2(1+2+3+.....+2016) = 2·2016·2017/2 =2016·2017
S + S1 + 1 = 1+2+3+4...........+4033 = 4033·4044/2 = 4033·2022
S = 4033·2022 - 2016·2017 -1 = 4088453