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

When using Fleming's Left Hand Rule to determine the direction of the force on an electron moving in a magnetic field, the velocity vector (V) is represented by
If John starts with $85 and is spending $5 per week and Ashley has $35 and is saving $7 per week when will Ashley have more than John
A total of 394 people got on a boat that already had 108 people on it. what is the best estimate for the total number of people on the boat?
Help me PLEASEEEEEEEEEEEEE
Base your answer on the information below. Some carbonated beverages are made by forcing carbon dioxide gas into a beverage solution. When a bottle of one kind
What is the fifth property of sound?​
Find the indicated limit, if it exists.
]This problem is for my math class Solve the inequality below 6x - 5 < 55
Are people morally obligated to help the poor? minimum of 300 words please​
Can someone help me for questions 5 and 6 for English pleasee!