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

Relax

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

Kung sakaling dumating ka sa panahong ikaw ay magpapamilya kaninong paniniwala ang iyong susundin: sa simbahang katoliko o sa pamahalaan

The Twelfth Amendment affects the election of the president and the________.

Vermont had 3 inches of snow on the ground before the sun melted 2 inches. The next storm tripled the amount on the ground. The sun then melted 1 1⁄2 inches. Ho

Which combinations of traits would be possible in future generations if the genes for fur color and eye color assort independently? Select all possibilities. b

Samson bought 5 cartons that each have 20 strawberries. She already had 109 strawberries. If she then sells 100 strawberries, how many strawberries does she hav

True or false members of the anti-imperialist league believed it was wrong for the us to rule other people without their consent

Simplify the following expression (30/45g+20)-(8/9g+7)

A researcher who is curious about how changes in education laws affect employment rates is most likely using which paradigm? a- Postmodernism b-Structural Fun

Why did so many Northerners oppose the Dred Scott decision? They believed that all African Americans should be citizens. They were concerned that laws prohibiti

After becoming president after roosevelt's death in 1945, former vice president harry truman knew nothing about the __________.