U2=6,U4=24,U6.......??

kalau aritmerika
2b = 24 - 6
2b = 18
b = 9
.
6 = a + 9
a = -3
.
u6 = a + 5b
u6 = -3 + 45
u6 = 42

kalau geometri
r^2 = 4
r = 2
a = 3
.
u6 = a . r^5
u6 = 3 . 32
u6 = 96

monggo dicek lagi

1) jika deret aritmetika
2 (u4) = u2 + u6
u6 = 2 (u4) - u2
u6 = 2(24) - 6
u6 =  42

2) jika deret geo
(u4)² = u2 x u6
u6 = (u4)² /u2
u6 = (24)² /6 =  96