Series and sequences
Suppose that (b_n) is a sequence of real numbers such that:
(b_n) = (17, -21, 4, -2, 1...) and lim of b_n as n approaches ∞ equals 4
Find s = ∞ ∑ n=1 (b_(n+1) − b_(n))
If the series does not converge, enter 'DNE'.
for clarification: b_n = b subscript n