4
Four
Qutro
The correct answer is: The nth term is 4n + 1
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n+4
The nth term is 4n - 3
2n+5
This is an Arithmetic Series/Sequence. In general the nth term, A(n) = a + (n - 1)d....where a is the 1st term and d is the common difference. In this question, the 1st term equals 1 and the common difference is 4. Then the nth term, A(n) = 1 + (n - 1) x 4 = 1 + 4n - 4 = 4n - 3.
The nth term is 2n+5 and so the next number is 17