J. 1 , 5 , -1 , 3 , 7 , 1 , 5 , 9 , 3 , 7 , 11 , 5 , 9 , 13 , 7

+4 -6 +4 +4 -6 +4 +4 -6 +4 +4 -6

K. 2 , -1 , 1 , 0 , 1 , -1 , 2 , -1

-3 +2 -1 +1 -2 +3 -3

Soal nomor 2

A. 4,10,…,…,28,34,40, setiap bilangan +6

4,10,(10+6),(10+6+6),28,34,40

4,10,(16),(24),28,34,40

B.100,93,…,76,….,56,48, setiap bilangan -8

100,92,(92-8),76,(76-8),56,48

100,92,(84),76,(68),56,48

C. 7,13,11,…,…,21,19,25,23,29, ada dua deret

deret suku ganjil

7,11,(15),19,23

deret suku genap