Sean1peters Sean1peters
  • 17-05-2017
  • Mathematics
contestada

What is the 20th term of the following arithmetic sequence?
1/2 , 1 , 3/2, 2

Respuesta :

ghanami
ghanami ghanami
  • 17-05-2017
hello :
the common diffrence is : 2-3/2 =3/2-1 = 1-1/2 =1/2
an = a1 +(n-1)d    (general term)    a1 =1/2   d=1/2
an = 1/2+(n-1)(1/2) = 1/2n
if n =20 a20 = (1/2)(20) = 10 
Answer Link

Otras preguntas

what is a good sentence for nomad
For what value of x would be the quotient (3x²+4x-5) ÷ (x+2) not make sense?
what is the solution to the proportion? 9/x=4/12 Answers: A. 13 B. 27 C. 17 D. 3
If you left a board lying in the grass for a few days, what would happen to the grass underneath the board? Why?
really need help Eighty decreased by three times a number os the same as five times the number increased by eight find the number i am really confused
to the nearest tenth of a percent, what is 8/13 written as a percent? Answers: A. 0.6%
Which sentence has a misplaced adjective clause?   A. Little Emily, whose parents claime
what is 2.48 rounded to the nearest tenth
what is 8.94 rounded to the nearest tenth
Select the pair of equations whose graphs are perpendicular.  A.2y = –3x + 5    2x + 3y = 4  B.5x – 8y = 9    12x – 5y = 7  C.y = 2x – 7     x + 2y = 3  D.x + 6