Question

If 4n + 1, 6n, and 7n + 2 are the first three terms of an arithmetic sequence, what is the sum of the first 20 terms of the sequence?
(A) 108
(B) 605
(C) 830
(D) 1,210
(E) 2,420

Answer 1

the difference between the terms in an arithmetic sequence is ___________?
fill in the blank

Answer 2

You just subtract term 1 from term 2.

Answer 3

the difference is constant