Jawabanmu

2014-04-28T20:57:02+07:00
(k+1), 3k, (4k+2)
= (3+1), 3.3, (4.3+2)
= 4, 9, 12+2
= 4, 9, 14
jadi bedanya 5 dan nilai k = 3
2014-04-28T22:57:54+07:00
B=b | U3-U2=U2-U1 | 4k+2-3k=3k-(k+1) | k+2=2k-1 | k=3 semoga membantu^^