Answer:
7
Step-by-step explanation:
Calculate and sum up the first three terms.
We get:
4[ (1/2)^(1-1) + (1/2)^(2-1) + (1/2)^(3 - 1) ], OR
4[ 1 + (1/2) + (1/2)^2 ], or
4[1 + 1/2 + 1/4} = 4[7/4] = 7
