Tentukan 3 suku berikutnya dari barisan berikut: A. 6,8, 11, 15,... B. -2,4,-8,16,...

Kelas 8 Matematika
Bab Barisan dan Deret Bilangan

a] 6, 8, 11, 15, ...
.......2...3....4...


+2, +3, +4, ...

U5 = 15 + 5
U5 = 20

U6 = 20 + 6
U6 = 26

U7 = 26 + 7
U7 = 33

6, 8, 11, 15, 20, 26, 33, ....

b] -2, 4, -8, 16, ...

U2 = -2 . (-2)
U2 = 4

U3 = 4 . (-2)
U3 = -8

U4 = -8 . (-2)
U4 = 16

U5 = 16 . (-2)
U5 = -32

U6 = -32 . (-2)
U6 = 64

U7 = 64 . (-2)
U7 = -128

-2, 4, -8, 16, -32, 64, -128, ...