Question

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

Answer 1

y=2+4+6+8+.....+48(simplificam prin 2)
y=1+2+3+4+.....+24⇒y=24*25\2
y=12*25
y=300

Answer 2

y=2*(1+2+3+...24)     se foloseste formula lui Gauss
y=2*(24*25:2)
y=2*(600:2)
y=2*300
y=600