1998jzavjzav
1998jzavjzav 1998jzavjzav
  • 25-07-2017
  • Mathematics
contestada

What is the sum of the first five terms of a geometric series with a1=20 and r=1/4

Respuesta :

irspow
irspow irspow
  • 25-07-2017
The sum of a geometric sequence is:

s(n)=a(1-r^n)/(1-r), a=initial term and r=common ration so

s(n)=20(1-0.25^n)/(1-0.25)

s(5)=20(1-0.25^5)/(0.75)

s(5)=26.640625
Answer Link
haleyfordice75 haleyfordice75
  • 10-04-2019

Answer: 26.640625

Step-by-step explanation:

Answer Link

Otras preguntas

what two numbers when multiplied makes 6 but when added equals -10
A hotel has a total of 7 floors if there are 35 standard rooms on each floor how many standard rooms are there
What is the relationship between Human and belief
Consumer law is the system that is designed to protect the people involved in a market. True False
please help!!!!!!!!!! ​
ANSWER NEEDED PLZZZZ. Imagine that you get a chance to spend a day on Planet Mars, the red planet with your friends. What will be your preparation and how do yo
What is the process of using one or more of your five senses to measure or collect data? A.a conclusion B.an observation C.the scientific method D.an inquiry
How do you my name is ?
Simple question for some points 3^1)x3)/3
Explain why opportunity cost is the best forgone alternative and provide examples of some opportunity costs that you have faced today.