trelltrell111 trelltrell111
  • 12-05-2017
  • Mathematics
contestada

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

Respuesta :

zebsi0n
zebsi0n zebsi0n
  • 12-05-2017
The common difference is 6.
Now, plug this into the equation for the sum of an arithmetic sequence:
[tex] \frac{n}{2}[2a(1) + (n-1)d] [/tex]
a(1) is 3 (the first number)
n = 36 (the number of terms to sum up to)
d = 6 (common difference)
[tex]18[6 + (35*6)][/tex]
[tex]18[216][/tex]
3888
Answer Link

Otras preguntas

How did the american and french revolutions affect enslaved people in haiti? responses haitians believed they could defeat the british if the americans did. ha
one compromise that would make the abolitionists happy
Which philosophy was Medieval Europe’s culture society focused on? What is the most important belief of this system?
What are the slopes of these lines and how are they perpendicular
ANSWER MY CHEM QUESTIONS PLS ASAP CHECK MY PROFILE
help me with math, its 8th grade 100 points look at attachment
There are several levels of narrowing a topic, from very broad to something appropriate for your assignment. Which of the following is an example of effective n
C(0)=0 Let c(t) be the number of customers in a restaurant t hours after 8am Explain the meaning of each statement please help
dont answer this questipn please ​
after teaching a group of nursing students about pharmacokinetics, the instructor determines that the education was successful when the students identify what p