mekhaiyasanai mekhaiyasanai
  • 23-08-2022
  • Mathematics
contestada

If each term in a geometric sequence is defined as
an = -6. (-1)"-1
what's the sum of the first 20 terms of
the sequence?

A. 0
B. 6
C. 120
D. 15

Respuesta :

Medunno13
Medunno13 Medunno13
  • 27-08-2022

Answer:

A

Step-by-step explanation:

[tex]a_n=-6(-1)^{n-1} [/tex]

The first term is -6 and the common ratio is -1.

The sum is thus

[tex]\frac{6(1-(-1)^{20})}{1-(-1)}=0[/tex]

Ver imagen Medunno13
Answer Link

Otras preguntas

can someone help me with these problems
Do you support or oppose Kaepernick's actions? Please Explain
no country on the globe is so happily situated, or so internally capable of raising a fleet as America. Tar, timber, iron, and cordage are her natural produce.
5 propoziti la negativ la engleza cu cuvintele {break,go,send,give,find}.si la afirmativ tot cu acelasi cuvinte si tot 5 propoziti
what is (-4)8 equals what
what is meant by the statement that “science is tentative”?
Which of the following scenarios reflect communication that is ethical? a. Jeremy falsely reports a crime. b. Ethan is asked to ignore company policies at wo
what is the distributive property of 65 x 7
Which term is a type of detail? style chronology statistic prose
America's first satellite launched in space was called?