cmontp1djfb
cmontp1djfb cmontp1djfb
  • 15-01-2018
  • Mathematics
contestada

What is the explicit formula of:
a. 1/3, -2/9, 4/27, -8/81
Also, how do you find it?

Respuesta :

Аноним Аноним
  • 15-01-2018
this looks like a Geometric Sequence in which you get the next term by multiplying by a constant factor

- 2/9 / 1/3  = -2/9 * 3 = -2/3
4/27  / -2/9  = 4/27 + 9/-2 =  -2.3 also  
and last term divided by 4/27 gives -2/3 as well   so it is a GS  with common ratio (r) = -2/3.

nth term  an = a1r^(n-1)   where a1 = frst term and r = common ratio.

so here it is  1/3 (-2/3)^(n-1)  <===== explicit formula
Answer Link

Otras preguntas

How do I write n+5n= 12c-c= and -4j-1-4j+6= in simplest form?
Your grandmother in Ireland sends you her favorite cookie recipe. Her instructions say to bake the cookies at 190.5°C. To what Fahrenheit temperature would you
What happens when two oceanic plates collide
which is bigger 20 kilograms or 2,000 grams
how do you unscramble the science topic atsetlectoicnp
What does this quote mean? "Our desire to conform is greater than our respect for objective facts"? And you either defend, challenge, or neutral for the quote.
How can I split five brownies between three people
If the volume of a cube is 27 cubic meters, find the surface area of the cube
If 2x^2 + 6x = 36, what are the possible values of x ?
How to answer the following questions in spanish?? Quien batea? Con que batea?