Question

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

Answer 1

Răspuns:

Explicație pas cu pas:

S = 1+2+3+...+100

6+12+18+24+...+600 = 6*(1 + 2 + 3 + 4 + ...+ 100) = 6S

3+6+9+12+...+300 = 3*(1 + 2 + 3 + 4 + ....+ 100) = 3S

__________

(6S)^2 : 3S : S = 36S^2 : 3S : S = 12S : S = 12