crispablo10 crispablo10

26-02-2021
Mathematics

contestada

What is the sum of the geometric sequence -3, 18, -108, ... if there are 8 terms

Respuesta :

27-02-2021

Answer:

Step-by-step explanation:

common ratio=18/-3=-108/18=-6, a=-3

sn=a(r^n-1)(r-1)

sn=-3((-6)^n-1)(-6-1)

sn=-3(-6)^8-1)/(-7)

s8=-3(1679615)/(-7)

s8=719836

Answer Link

Otras preguntas

How does the cultural landscape assist in indicating the differences between a wealthy neighborhood and a poverty-stricken neighborhood?

the product of two consecutive integers is 1 more than their sum. find the integers

Hiking burns about 144 calories each half hour.About how many calories can be burned if someone hikes 3 days a week for an hour?

Hanging out with friends, watching your favorite TV show, and buying a pair of new shoes are all examples of _____ for doing well in school.

The nose of an ultralight plane is pointed south, and its airspeed indicator shows 28 m/s . the plane is in a 18 m/s wind blowing toward the southwest relative

One car travels 62 miles per hour and another travels 48 miles per hour at the same place at the same time and travel in the same direction after how many hours

the sum of two numbers is 64. One number is 8 more than the other. What are the two numbers?

The cells on your fingertips are exposed to friction every time you touch something. thus, you can surmise that the fingertips are covered in __________.

What best defines internationalism?

how does William Bryan compare the situation in the Philippines with the American Revolution?