Identify a1, r, and n for the sum of the geometric series. 1 2 + 3 8 + 9 32 + 27 128 + 81 512

a1 = 1/2

r = 3/4

n = 5

Step-by-step explanation:

The given geometric series is:

a1 represents the first term of the series. From the above series we can see that the first term is 1/2

r is the common ratio of a geometric series. It can be calculated by dividing any term of the geometric series with its previous terms. For the given series r will be:

n represents the number of terms in the series. From the above series we can count the number of terms to be 5.

the correct answer is c