Quirkco9o5garis Quirkco9o5garis
  • 21-11-2016
  • Mathematics
contestada

what is the sum of the arithmetic sequence 3,9,15, if there are 36 terms ...?

Respuesta :

rybag99
rybag99 rybag99
  • 21-11-2016

n = 36

a = 3

d = 3

(n/2) (2a + (n - 1)d)

(36/2) (2(3) + (36 - 1)3)

18(6+35(3))

18 x 111 = 1998

The sum is 1998


Answer Link

Otras preguntas

5^(-x)+7=2x+4 it wont bring up the answer.
Two positive integers have a sum of 14 and a product of 24 what are the integers ?
WILL GIVE BRAINLIEST PLZ HELP Elevator 1 in a building moved from ground position to a final position of +20 feet. Elevator 2 in the same building moved from gr
Is 11/25 , 3/20 , 2/6 a repeating decimal ?
Which angles are supplementary? ∠LKM and ∠MKN ∠PKO and ∠PKL ∠PKO and ∠MKN ∠MKN and ∠OKN
Read the following stanza from Audre Lorde's poem "Hanging Fire" and answer the question. I am fourteen and my skin has betrayed me the boy I cannot live withou
How many pairs of intersecting line segments are shown?
Which contrast does Dr. King present in this part of the letter?
PLEASE HELP I NEED IT FAST
- Se cuentan con diez obreros en una planta, y ellos tienen igual capacitación y méritos para ser promovidos, pero existen sólo tres posiciones de “primera”, ci