Going from 3 to 7 is a jump of + 4, and going from 7 to 11 is a jump of + 4.
Therefore we know that the start of the nth term is going to be 4n.
So...when n = 1, 1 x 4 = 4, but we know from the sequence that when n = 1 the answer is 3, so we simply take 1 off the end to make...
4n - 1
The nth term in this sequence is 4n + 3.
It is: 2n+9
The nth term for that arithmetic progression is 4n-1. Therefore the next term (the fifth) in the sequence would be (4x5)-1 = 19.
It is 4n -1 and so the next term will be 23
The next term is: 15+4 = 19 The nth term is: 4n-5
The nth term in this sequence is 4n + 3.
If you mean: 15 11 7 3 then the nth term is 19-4n
The nth term is 4n-1 and so the next term will be 19
It is: nth term = 5-4n and so the next term will be -19
If you mean -1 3 7 11 15 then the nth term is 4n-5 and so the next term will be 19
It is: 2n+9
The nth term is: 2n+7 and so the next number will be 19
Double it minus the previous number.
The nth term for that arithmetic progression is 4n-1. Therefore the next term (the fifth) in the sequence would be (4x5)-1 = 19.
It is 4n -1 and so the next term will be 23
The simplest, out of infinitely many possible answers, is the linear polynomial,U(n) = 4n - 1 for n = 1, 2, 3, ...
It is: nth term = 7n-9