Answer:
504
Step-by-step explanation:
Given,
common ratio (r) = 0.5
first term (
) is 256
Sum of first n terms in geometric series is given by the formula (r < 1):

Hence, sum of first 6 terms mean:
r = 0.5
a = 256
n = 6
Substituting, we get the answer to be:

The sum of first 6 terms is 504