Tabitha2002 Tabitha2002
  • 24-04-2018
  • Mathematics
contestada

Find the sum of the first 5 terms of the geometric series -2, -6, -18, …

Respuesta :

Banabanana
Banabanana Banabanana
  • 24-04-2018
a₁ = -2
a₂ = -6

[tex]r= \frac{a_2}{a_1}= \frac{-6}{-2} =3 \\ \\ \\ S_5= \cfrac{a_1(1-r^5)}{1-r}= \cfrac{-2(1-3^5)}{1-3}=\cfrac{-2(1-243)}{-2}=1-243=-242[/tex]

Answer: -242
Answer Link

Otras preguntas

What is the value of b2 - 4ac for the following equation? x 2 + 5x + 4 = 0 9 16 25
Consider the functions?
Before government approves a merger, what must the companies prove the merger would do?
Although the new jersey plan was ultimately rejected at the constitutional convention, one of its proposals that was retained in the new constitution was
Your license can be suspended for up to (blank) if you accumulate 24 points within a 36-month period
A company's total assets are $98,000 and total liabilities are $49,000. Find the current ratio.
O avoid trichinosis, pork should never be under cooked. new york city health code requires pork to be cooked to a minimum temperature of:
What is the relationship between the following pair of words? brilliance : Genius • greater to lesser • whole to part • quality to person • group to exampl
In the figure below, ∆ABC is similar to ∆DBE. Given that BE=10cm, AB=3cm and BD=4cm. Find the length of BC.
Which type of reaction occurs in the core of a nuclear reactor in a nuclear power plant?