Jawabanmu

2014-04-21T23:02:49+07:00
U12 = a + 11b = 64
U6  = a + 5b    = 4
(dieliminasi)
10b = 60
b = 6

U6=a + 5b = 4
=a + 5.6 =4
=a+30 = 4
a= -26

U8 = a+7b = -26 + 7.6 = -26 + 42 = 16
barisnya geometri sist
oo,iya. itu aritmatika :D
maaf, tadi kirain aritmatika
2014-04-21T23:24:37+07:00
Jawaban di gambar,,,, menurutku spt itu