The sum of a geometric series with four terms is 60, and the common ratio is = 1/2. find the first term.

Step-by-step explanation:

A geometric series is of the form , where r is the common ratio, and a is the first term of the series. This means that for our case, where the r is 1/2 and the first 4 terms add up to 60, we have:

Which we can keep calculating as

So we can solve for a: