The nth term of a sequence is given by (-1)\(^{n-2}\) x 2\(^{n-1}\). Find the sum of the second and third terms.
A
-2
B
1
C
2
D
6
E
12
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
when n = 2
(-1)\(^{n-2}\) x 2\(^{n -1}\) = 2
When n = 3
(-1)\(^{n-2}\) x 2\(^{n - 1}\) = -4
Sum = 2 - 4 = - 2
Source: WAEC / JAMB / NECO Classroom Archive (Record #23192)