zoyaxfj
zoyaxfj zoyaxfj
  • 04-03-2019
  • Mathematics
contestada

If the sum of the first n terms of sequence is (2n^2)+3, find the first two terms of the sequence

Respuesta :

jimrgrant1 jimrgrant1
  • 04-03-2019

Answer:

5, 6

Step-by-step explanation:

Given the sum to n terms is

[tex]S_{n}[/tex] = 2n² + 3, then

[tex]S_{1}[/tex] = 2(1)² + 3 = 2 + 3 = 5 ⇒ [tex]a_{1}[/tex] = 5

[tex]S_{2}[/tex] = 2(2)² + 3 = 8 + 3 = 11

⇒ [tex]a_{2}[/tex] = 11 - 5 = 6

Answer Link

Otras preguntas

Energy, growth, evolutionary, and ecological describe different biological _____.
When magma cools off Earth's surface, which type of crystalline structure is usually found?
what is the volume of silver metal which weighs 820.0g. the density of silver is 10.5g-cm3.
comparison: Sara has three times as many pencil erasers as Sam together they have 28 erasers how many erasers does Sara have
Genoa and barcelona were seriously affected by the black death. Why do you think this was so ?
This week, Beth made 10 more than twice the number of cookies she made last week, x. Which expression represents the total number of cookies Beth made this week
In what direction does an applied force move an object? A. in the same direction as the force B. independent of the force C. in the opposite direction of t
What type of theory is the theory of moral criticism?
What is the method of reasoning that involves using specific facts to form a conclusion ?
During which stage of the writing process do you begin to see how your ideas are connected? A. Drafting B. Editing C. Prewriting D.Revising