parisfrance896 parisfrance896

11-03-2016
Mathematics

contestada

find the sum of the geometric series -3,15,-75,375 when there are 9 terms and select the correct answer below

Respuesta :

Аноним Аноним

11-03-2016

The sum to nterms:

Sn=a(r^n - 1) / (r-1)

r=15/-3=-5
a=-3

Sn=-3(-5⁹ - 1) / (-5-1)=-976563

Answer; -976563

Answer Link

Otras preguntas

B. Use the polite phrases in the box to ask permission for items. Would you mind if I...? Would it be alright if I...? Is it OK if I...? I wonder if it might be

kolera is infected with the

I don’t know how to do this question and my math teacher is not helpful

PLEASE HURRY! What is the value of x in this triangle? The triangle is labeled 5, 20 & xEnter your answer as a decimal in the box. Round only your final ans

the diagram shows a sector of a circle radius 10cm calculate the perimeter of the sector give answer to 1 decimal place

A 700 mL sample of nitrogen is heated from 37 °C to 77 °C at constant pressure. What is the final volume? a. 790 L b. 790 ml c. 970 ml d. 970 L

Write down the first three and last two terms of the binomial expansion of: a) (3x+(2/x))^15 b) (2x-(3/x))^20

A person goes to a doctor due to a loss of blood. The Doctor also noticed swollen legs and bulgy veins in the legs. On top of that the person has been feeling a

In the 1970s, the U.S. government passed laws to protect the water supply. Which of the following best describes something these laws were intended to do? A. Re

What information does the Sergeant/Captain give to King Duncan? How does Macbeth behave in battle?