Question

daca 75/a = x/52 si a = 2+4+6+...+50 , atunci x =?

Answer 1

Răspuns:

a=2+4+6+...+50=2x1+2x2+2x3+...+2x25=2(1+2+3+...+25)=2(25x26/2)=2(25x13)=2x325=650

75/650=x/52

3/26=x/52

x=3x52/26

x=156/26=6

Sper sa te ajute!