Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

3, 6, 11,18, ...

The first four terms of a sequence are shown above. Which of the following could be the formula that gives the nth term of this sequence for all positive integers n?

(A) 2n

(B) (2n) + 1

(C) 3n

(D) (n^2) + 1

(E) (n^2) + 2 

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