Find the sum of the first five terms using the geometric series formula for the sequence left curly bracket 1 half comma space minus 1 comma 2 comma negative 4 comma... right curly bracket

Step-by-step explanation:

Given the geometric series:

To find:

Sum of series upto 5 terms using the geometric series formula = ?

Solution:

Formula for sum of a n terms of a geometric series is given as:

is the first term of the geometric series

is the common ratio between each term (2nd term divided by 1st term or 3rd term divided by 2nd term ..... ).

Here:

So, applying the formula for given values:

So, the answer is

c

step-by-step explanation:

i think because what else can be a sample of every member