1) 2,6,11,17 ,a ,b.... 6-2=4, 11-6=5, 17-11=6, a-17=7 ,b-a=8
a=24 , b=32
ans = 2,6,11,17, 24, 32......
2) 3 1/5, 8, 11 3/5, 14, a, b,.... 8-3 1/5=24/5, 11 3/5-8=18/5, 14-11 3/5=12/5 , a-14=6/5, b-a=0/5=0
a=76/5=15 1/5 , b=76/5=15 1/5
ans= 3 1/5, 8, 11 3/5, 14, 15 1/5, 15 1/5
3) 1...