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1/100+2/100+...+99/100=(1+2+...+100)/2=suma gauss=100*101/2=50*101=5050 S=1/1001+3/101+...+199/101=(1+3+...199)/101= Pt a calcula paranteza de la numarator te folosesti de formula 1+3++5+...+2n-1=n² 2n-1=199=> n=200:2=100 Asadar 1+3+...+199=100²=10000 S=10.000/101
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