Question

Calculează:(5/1+5/2+5/3+…..+5/30):(9/2+9/4+9/6+…..+9/60)
Urgent va rogg ca am mâine

Answer 1

Răspuns:

5(1/2+1/3+1/4..+1/30):(9/2)(1/2+1/3+1/4+..+1/30)=

[(5×2)/9](1/2+1/3+..+1/30)/(1/2+1/3+. .+1/30)=

10/9 sumele s-au redus