Answer:
B
Explanation:
Just a quick note to start with. 2^(n-2) will eventually give 32, (2^5) but n - 2 doesn't go that high (to 5). n would have to be 7 in order to get 32. So C is not the answer.
I think what you are intended to do is find the sum of the terms created by letting n = 1 then 2 then 3 then 4 then 5
n = 1
2^(1 - 2)
2^(-1)
1/2
n = 2
2^(2 - 2)
2^0 and that should give ta da
1.
n= 3
2^(3 -2)
2^(1)
2
n = 4
2^(4 - 2)
2^(2)
4
n = 5
2^(5 - 2)
2^3
8
Now you just add all of them together.
1/2 + 1 + 2 + 4 + 8
15 1/2
15.5
The answer to the summation is 15.5
The Answer is B