The Correct answer is B.

Explanation

You do not know the value of the  term or the  term of the sequence, but you do know the values of the <, and  terms. The correct formula must give as the value of the  term,  as the value of the  term, and  as the value of the  term. Choice E, , gives , not , as the value of the  term. Choice A, , gives , not , as the value of the  term. Choice C, , gives , not , as the value of the  term. Choice D, , gives , not , as the value of the  term. This leaves choice B, , which gives the correct values for the , , and  terms of the sequence.