Question

Find the first four terms of the given sequence tn = (-1)n(n).

Answer 1

First we rewrite the expression correctly:
 tn = ((-1) ^ n) * (n)
 We now look for each of the terms:
 t1 = ((-1) ^ 1) * (1) = - 1
 t2 = ((-1) ^ 2) * (2) = 2
 t3 = ((-1) ^ 3) * (3) = - 3
 t4 = ((-1) ^ 4) * (4) = 4
 The first four terms of the sequence are then:
 -1, 2, -3, 4
 Answer:
 B.
 -1, 2, -3, 4