Question

a+(a+4)+(a+8)+...+(a+2000)=502002

Answer 1

a+(a+4)+(a+8)+.....+(a+2000)=502002
aflam cati de a sunt:
4:4=1
8:4=2
.........
2000:4=500
______________
IN TOTAL 500 NUMERE
cu primul a se fac in total 501 a
avem : 501a+4+8+....+2000
efectuam suma: 4+8+.....+2000.
2000+...+4
_______________
2004 x 500:2= 501000
501a+501000=502002
501a=1002
a=2

Answer 2

Răspuns

a+a+a+,..+a=501a  4+8+12+,...+2000=(4+2000).500\2=1002.500=501000 ;501a=502002-501000=1002 ;a=1002:501=2

Explicație pas cu pas: