Jawabanmu

2014-02-12T19:32:12+07:00
U4 = 19
u7 = 37
(37-19)/(7-4) = 18/3 = 6 ⇒bedanya
u24 = (24-7)×6 = 17×6 = 104, u24 = 37+104 = 141
u1 = (4-1)×6 = 18, u1 = 19-18 = 1
sn = n/2 (u1+un)
       24/2 (1+141)
12 × 142 = 1704
Jawaban paling cerdas!
2014-02-12T19:53:06+07:00
Maaf kalau ada jawaban yang berbeda :D
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