What is the sum of the first eight terms of a geometric series whose first term is 3 and whose common ratio is 1/2?

The sum of the first 8 terms is  which agrees with the answer option "C" in the problem

Step-by-step explanation:

Recall that the formula for the partial sum of of the first "n" terms of a geometric sequence of first term  and ratio "r" is:

Then, for our case this becomes:

step-by-step explanation:

kjswgdkxg

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).