To find the sum of the geometric sequence, we can use the formula:

Sn = (G1 * (1 - r^n)) / (1 - r)

where Sn is the sum of the sequence, G1 is the first term, r is the common ratio, and n is the number of terms.

In this case, G1 = 1 and r = 1/2. We need to find the sum from the 1st term to the Nth term, so we substitute n = N into the formula:

Sn = (1 * (1 - (1/2)^N)) / (1 - 1/2)

Simplifying further:

Sn = (1 - (1/2)^N) / (1/2)

To find the sum, we need to evaluate this expression.