Alspach556
Alspach556 Alspach556
  • 15-08-2015
  • Mathematics
contestada

Find the sum of the given arithmetic series. 27 + 20 + 13 + 6 + ... + (–36) a. –45 c. 315 b. –9 d. –90

Respuesta :

Benjamin16
Benjamin16 Benjamin16
  • 15-08-2015
[tex]r=20-27=-7 \\ \\ a_{1}=27 \\ \\ a_{n}=a_{1}+(n-1)r \\ \\ -36=27+(n-1)*(-7) \\ \\ -7(n-1)=-63 \\ \\ n-1=9 \\ \\ n=10 \\ \\ S_{10}= \frac{27-36}{2}*10=-9*5=-45 [/tex]

\\\ Ben
Answer Link

Otras preguntas

What city did the Americans capture without firing a shot?
When the Hebrews first settled in their land, they called the country Israel. What caused it to be renamed Palestine? A.The Jews renamed it after uniting Israel
simplify each equation, then solve. 1) log 2 128=x
What is 0.000982 in scientific notation
What are the three forms of water and what are the scientific names when they change into each other
What city did the Americans capture without firing a shot?
what is the objective of the necessary and proper clause
equation and check the solution to this problem, I'm having problem figuring this out. x+3=7
how did the great depression affect political life in Germany and Japan?
The landmark civil rights case of __________ rendered invalid the decision in the Supreme Court case of “Plessy v. Ferguson” (1896).