miko4kia0sonvaleyro miko4kia0sonvaleyro

25-05-2016
Mathematics

contestada

What is the sum of the first 27 terms of the following sequence? 1, 5, 9, 13, . . .
a. 1,431
b. 1,571
c. 2,862
d. 2,943

Respuesta :

Аноним Аноним

26-05-2016

Sn = (a1+an)* n / 2
an = a1+d(n-1)

d = 5-1 = 4
a27 = a1+d(27-1) = 1 + 4(27-1) = 105
S27 = (1+105)*27/2 = 1431

Answer Link

Otras preguntas

advertising expenses occupy approximately what percentage of global economic activity?

what elements of culture thrived during the tokugawa shogunate

gene regulation can occur only during transcription and translation.

Question number 1- "Consumers" within a biome are: plants,omnivores,herbivores, carnivores please choose more than one. Question number 2- Animals which only co

BA is congruent to BC and DA is congruent to EC. Prove BD is congruent to BE.

Write a paragraph explaining two reasons that motivated Europeans to colonize part of the world in the 19th and 20th centuries.

Magnesium has three naturally occurring stable isotopes, 24Mg (abundance 78.99%), 25Mg (abundance 10.00%) and 26Mg (abundance 11.01 %). Calculate the relative a

Question 1 of 5 The Fertile Crescent was a good place for civilizations to begin because its land featured: O A. rivers that did not flood when it rained. O B.

Công ty Z có giao kết HĐLĐ có thời hạn 36 tháng (từ 1/1/2019 đến 1/1/2022) với người lao động Y, công việc là công nhân xưởng bao bì, mức lương 7.000.000 VNĐ/th

what is 2x times x in factorizing?