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

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

Biologists have discovered ways ________ can reduce the symptoms of diseases. weather diet energy water

What is the shape of the orbit of satellites? A. helical B. elliptical C. aphelion D. perihelion

Which of the following are common characteristics of a Shakespearean comedy? mistaken identities inaccurate historical information the theme of love the theme

A school district needs 3 teachers for every 70 children. They expect to have 14,700 children in the district next year. At this time, they have 612 teachers. H

Marty sensed that his baseball team was in trouble. would this be a noun, adjective, adverb, or verb?

over the summer Karen earned $180 is for 7 weeks of that money she spent $375 on a new computer and $137 on new clothes how much money does he have left

How does recycling help bridge the gap between renewable and nonrenewable resources?

Activities that occur during the reconstitution phase of the continuity implementation cycle are

water's unique property of ______ allows water molecules to stick together so they can be pulled upward by the force of transpiration

A solution that has a pH of 1 is considered to be which of the following? a. Abnormal b. Acidic c. Alkaline d. Neutral