kittybiancacardenas kittybiancacardenas

22-06-2020
Mathematics

contestada

Find the sum of the first 31 terms of the following series, to the nearest integer. 5 , 14 , 23 , . . .

Respuesta :

devishri1977 devishri1977

23-06-2020

Answer:

Step-by-step explanation:

a1 = 5

common difference = 2nd term - 1st term= 14 -5 = 9

n = 31

[tex]S_{n}=\frac{n}{2}[2a+(n-1)d]\\\\S_{31}=\frac{31}{2}[2*5+30*9]\\\\=\frac{31}{2}[10+270]\\\\=\frac{31}{2}*280\\\\=31*140\\\\=4340[/tex]

Answer Link

Otras preguntas

The camp has two fire pits. One is a rectangular fire pit with a perimeter of 20 inches. The other is a circular fire pit with a circumference of 7 inches. Shak

Can the sides of a triangle have lengths 7.6, 2.5, and 2.2?

1. Explanation on how selected medical, social and inherited factors disrupt body systems to cause ill health. 2. Evaluate the social issues which arise from i

Self-assessment means gathering information about one's: interests. оооо values. developmental needs. All of these choices are correct.

As the lead coder for a large physician practice, you notice that a couple of the coders are not following the official coding guidelines. What steps should yo

Non-flowering plants are known as seedless plants

Dylan owns a bag that contains 7 blue marbles, 5 purple marbles, 12 red marbles, and 6 orange marbles. If he randomly pulls a marble from the bag, What is the p

Read the excerpt below and answer the question. Well, the second night a fog begun to come on, and we made for a towhead to tie to, for it wouldn't do to try to

pls help .............................................../////////////////////////////////////////////

Why is math in coding so hard HELPPP PLEASEEE