Somez4a5prks Somez4a5prks

09-08-2016
Mathematics

contestada

what is the sum of an 8-term geometric series if the first term is -11, the last term is 180,224 and the common ratio is -4?

Respuesta :

dalendrk dalendrk

10-08-2016

[tex]a_1=-11;\ r=-4;\ a_8=180,224;\ S_8=?\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\S_8=\dfrac{-11[1-(-4)^8]}{1-(-4)}=\dfrac{-11(1-65,536)}{1+4}=\dfrac{-11(-65,535)}{5}\\\\=-11\cdot(-13,107)=144,177[/tex]

Answer Link

Otras preguntas

which composer catholic priest

what is the sea level during the last century?

c) The probability is 1% that an electrical connector that is kept dry fails during the warranty period of a portable computer. If the connector is ever wet, th

How do the president's actions impact the lawmaking powers of the legislative branch? Select three options. The president can sign a bill for it to become a law

The objective of a market analysis is to estimate key values that characterize the potential for a real estate project. In this assignment, we conducted an anal

Bronchitis is O a gradual destruction of the alveoli. O an abnormal sensitivity of the airways. O an inflammation of the bronchial tubes O a virus that affects

Three types of plate movements

The s............. of coke would also suffer as a result of a decline in demand for more expensive pizza. Please help! Urgent! Thankies

what is an example of a nitrogen-fixing bacteria that can be found in a swamp biome?

need help on this I'll give you brainly