abubakriyakub50 abubakriyakub50
  • 11-08-2021
  • Mathematics
contestada

Evaluate S8 for the series 1+3+6+9+12.........​

Respuesta :

Аноним Аноним
  • 11-08-2021

Answer:

S8 is 64

Step-by-step explanation:

[tex]{ \boxed{ \bf{S_{n} = \frac{n}{2} [2a + (n - 1)d]}}}[/tex]

n is number of terms; n = 8

a is the first term; a = 1

d is the common difference: d = 3-1; d = 2

[tex]{ \sf{S_{8} = \frac{8}{2}[(2 \times 1) + (8 - 1) \times 2 ]}} \\ \\ { \sf{{S_{8}} = 4(2 + 14)}} \\ { \sf{S_{8}}} = 4 \times 16 \\ { \sf{S_{8}}} = 64[/tex]

Answer Link

Otras preguntas

5. What type of story is made up of extended symbolism? A. An allegory B. An anecdote C. A myth D. A speech
What is the value of the expression 54.36 :-0.1
Which organic compound used for stored chemical energy contains carbon hydrogen oxygen and often phosphorus
Write an equation in slope-intercept form of the line that passes through (1, −9) and (−3, −9)
Plants that have evolved to be successful in hot, dry conditions carry out ____________ photosynthesis instead of ____________ photosynthesis.
What entity created the open systems interconnection (osi) seven-layer model?
Add: (3x3 - 2x2 - 6x) + (3x2 - 5x + 3).
What is the name of the center of an Earthquake? maxicenter epicenter center P line
Which of these variables is least likely to have a normal distribution? a.annual income for all 150 employees at a local high school b.lengths of 50 newly hatch
Write a number in which the value of the 9 is 1/100 the value of the 9 in the number 392,065.018