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

Which statement accurately describes the religion of early Hebrews? A. They believed in many gods and goddesses. B. They believed in a single, all-powerful God.

Foods that allow microorganisms to grow are called parasites True Or False

The number line shows the solutions to an inequality. Which inequality does not match the graph? <--|---|---|---|---|---|---|---|---|-> -4 -3 -2 -1

the first armed conflicts of the revolutionary war

Which statement best describes the relationship between proteins and nucleic acids? Proteins read the instructions that are contained in nucleic acids. Nucleic

What feature of Japan made it difficult to unify and govern? Many different religions Diverse and numerous immigrants Lacking communication with other nations C

At what location in a circuit is the electrical potential energy the greatest

Which one of the following molecules is a by-product of cellular respiration? A. Glucose B. Water* C. Oxygen D. Pyruvate

Anna's garden has an area of 48 square feet. She plants peas in 3/8 of the garden and herbs in 1/4 of it. The rest of her garden is planted with peppers . How m

who was the king that got executed in the 17th century