Question

aflați: y=2+4+6+8+...+48.
Urgent va rog

Answer 1

y=2+4+6+8+...+48
y=2(1+2+3+...+24)


y=2*$\frac{24*25}{2}$  


y=24*25=600

Answer 2

dai factor comun ...2(1+2+3+...+24)..cred