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

What prevents ions from crossing the plasma membrane via simple diffusion? A. Ions are too large. B. Ions carry a charge. C. Ions are hydrophobic. D. Ions do n
what is 24 ten thousands
Can some one please help me with this ???
A worker in a sunglass factory can make 50 frames or 100 lenses per day. There are 90 workers. How many workers should make lenses?
For what reason was the "Union Party" created? Who were its candidates?
do you guys what's 5y/3=20
out of 45 times at bat, Raul got 19 hits. Find Rauls batting average as a decimal rounded to the nearest thousandth.
For what reason was the "Union Party" created? Who were its candidates?
A carton can hold 1000 unit cubes that measure 1 inch by 1 inch by 1 inch. Describe the dimensions of the carton using unit cubes. Can you explain to me how to
what is m/9 - 1 = -2 whats the answer & steps