The answer depends on the value of B.
fu
7 - 4n where n denotes the nth term and n starting with 0
1 4 9 is a series of squared numbers. The nth term is [ n squared ]
Un = (-1)n*(2n - 1)
One possible solution is: Un = (-8n6 + 177n5 - 1520n4 + 6495n3 - 14492n2 + 16548n - 6120)/360
The "N"th term is -7. You can deduce this from: 19 - 7 = 12 - 7 = 5 - 7 = -2 - 7 = -9
The nth term is given by: rn = n2 + 8
It is: nth term = 7n-9
3n
3n
The nth term is 18 -3n and so the next term will be 3
The nth term is: 2n+7 and so the next number will be 19
The nth term of the sequence is 2n + 1.
44
fu
7 - 4n where n denotes the nth term and n starting with 0
Un = 4n - 9