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f (6+12+18+24+...+600)²: (3+6+9+12+...+300): (1+2+3+ ... + 100) =​

Răspuns :

(6+12+18+24+...+600)²: (3+6+9+12+...+300): (1+2+3+ ... + 100) =

6²(1+2+3+4+...+100)²: 3(1+2+3+4+...+100): (1+2+3+ ... + 100) =

6²/3(1+2+3+4+...+100):(1+2+3+4+...+100)=

6×6/3=12