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

What are some things the allegory suggests about the process of enlightenment or education?

Show all steps on how to solve. 0.25r - 0.125 + 0.5r = 0.5 + r

What is the focal length of a pair of contact lenses that will allow a person with a near point of 125.0 cm to read a newspaper held 25.0 cm from his eyes?

If 25 workers can pick 100 flats of strawberries per hour, then average product is?

Five new students join the Chess Club. The club president schedules games so that each of the new members plays a game against each of the other new memebers. H

If signs and symptoms of anaphylaxis occur rapidly in a patient, the emt must realize that?

Which type of leasehold lasts for a defined period of time and automatically terminates when that period ends?

Which type of buyer agency offers the flexibility to work with multiple agents but results in buyers acting on their own behalf since no agent owes fiduciary du

An assessment of a sample of semen for volume, viscosity, sperm count, sperm motility, and percentage of any abnormal sperm is known as a(an)?

You have to multiply hour by the unit rate as well. to make the second quantity in hour, so multiply the first quantity by