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.
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The nth term is 4n - 3
2n^2-1
4 Four Qutro The correct answer is: The nth term is 4n + 1
The nth term is: 5-6n
35 * * * * * That is the next term. The question, however, is about the nth term. And that is 6*n - 1