Jawabanmu

2014-06-09T11:24:00+07:00
4/3 7/6 13/12 25/24 , , , ,
a = 4/3 , b = 7/6 - 8/6 = -1/6
Sn = (n/2)(2a + (n-1)b)
S8 = 4(8/3 + 7(-1/6))
     = 4(16/6 - 7/6)
     = 4(9/6)
     = 36/6
     = 6