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

divide the fractions and simplify the answer 1/2÷5/8
The main impact of the invention of the cotton gin in 1793 was on
Which of these two demonstrate President Nixon's expertise in foreign relations matters? Nixon Doctrine visit to China the New Federalism Safeguard program
The surface area of a rectangular prism is 15 m2. What is the surface area of this prism, measured in cm2? A. 0.15 cm2 B. 0.0015 cm2 C. 150,000 cm2 D. 1500
Customary Units of Capacity Questions fill in the blanks. blank qt = 8 c 4 gal = blank qt blank gal = 16pt blank c =3 gal blank gal = 56pt 4 gal = blank pt bla
In a Punnet square a recessive allele is recorded as a upper case letter. lower case letter. number. symbol.
Which sentence does not contain any errors in comma usage? A. Our aunt makes delicious almonds coated in chocolate. B. There is your brother waiting by the fron
Which uses the correct verbs for formal speech or writing? If Jorge were just 15 months older, he would have finished school and be on his way to California at
At a restaurant, you eat 2 taco salads and drink 2 glasses of ice tea. Your friend eats 1 taco salad and drinks 1 glass of ice tea. The restaurant charges you $
Reported speech Exercise 158