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

Atolls are geological formations made up of :

plsss plss I am begging you can you do this

served as US president during the War of 1812

Read the passage below and answer the question. "...and in the fourteenth [fifteenth] century the whole English army, after ravaging the kingdom of France, was

(Advanced analysis) Answer the question on the basis of the following information for a mixed open economy. The letters Y, Ca, Ig, Xn, G, and T stand for GDP, c

PLS HELPThe holding tanks are congruent in size, and both are in the shape of a cylinder that has been cut in half vertically. The bottom of the tank is a curve

I need help plz help

where and when were your parents or other relative married

24. What are the intercepts of -3x + 5y - 2z = 60? (-20, 0, 0), (0, 12,0), (0, 0, -30) (-60, 0, 0), (0, 60, 0), (0, 0, -60) (-180, 0, 0), (0, 300, 0), (0, 0, -1

Brian made $198 for 11 hours of work. At the same rate, how many hours would he have to work to make $324 ?