Answers

2016-06-26T21:19:33+08:00
1. 3,12,21,30,39,48
d=9
2. 8,3,-2,-7,-12
d=-5
3. 5,12,19,26,33
d=7
4. 2,11,20,29,38
d=9
5. -2,4,10,16,22
d=6
6. 17,14,11,8,5
d=-3
7. 4,9,14,19,24
d=5
8. -4,0,4,8,12,16
d=4
9. -1,7,15,23,31,39
d=8
10. 13,7,1,-5,-11,-17
d=-6
2 2 2