Jawabanmu

2014-04-07T19:41:16+07:00
2014-04-07T19:47:24+07:00
204 + 210 + ..... + 300

Sn = ½ ((300 - 204) / (6 + 1) (300 + 204)
Sn = 48 / 7 (504)
Sn =  6,9 (504)
Sn = 3477,6