geometric sequences

given the geometric sequences:9 90/17, 900/289

find an explicit formula for an, where the first term is a1=9
an=
a10=

  1. 👍 0
  2. 👎 0
  3. 👁 70
asked by Rosie
  1. to find r, (90/17) / 9 = 10/17
    and (900/289) / (90/17) = 10/17

    a = 9
    r = 10/17

    term(n) = 9(10/17)^(n-1)

    term(10) = 9(10/17)^9 = appr .07589

    1. 👍 0
    2. 👎 0
    posted by Reiny

Respond to this Question

First Name

Your Response

Similar Questions

  1. math30

    Sequences 1)A sequence has a first term of 24 and every other term is one half of the previous term. a)Write the first four terms of the sequence. b)Find a recursive formula that defines this sequence. c)Find an explicit formula

    asked by alejandro on August 8, 2012
  2. 9th grade algebra (sequences)

    Can you check my homework please? Given the following representations, tell whether it's arithmetic/geometric, find the difference/ratio, find the explicit formula, find the recursive formula, and the given term. (This whole

    asked by Alexis on January 16, 2017
  3. Pre-calculus

    State whether the sequence is arithmetic or geometric, write a recursive and explicit formula and find the 10th term. 81, -27, 9, -3, 1... Sequence Type: geometric Recursive: _______ Explicit: ______ 10th Term: -1/243

    asked by HELP on April 28, 2019
  4. Geometric Series (Algebra 2)

    I need some assistance or a formula when trying to find the first term of geometric series please! I don't understand this!!!! What is the first term of a geometric series with a summation of 289, 5 terms and a common ratio of

    asked by Greg on April 14, 2012
  5. Math

    Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000 (inclusive). How many of these 1000 geometric sequences have the property that the sum of the 3 terms is

    asked by Maths lover Please Help... on May 1, 2013
  6. algebra

    Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000. How many of these 1000 geometric sequences have the property that the sum of the 3 terms is prime?

    asked by deli on April 29, 2013
  7. Maths

    Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000. How many of these 1000 geometric sequences have the property that the sum of the 3 terms is prime?

    asked by ianian on April 29, 2013
  8. Alg 2/trig

    I am doing Geometric sequences, but I cannot figure out how to find the Nth term of a geometric sequence. The problem is A1 = 64, Ak+1 = 1/2Ak (That is supposed to be A sub one, A sub k + 1, etc.) The formula for finding the

    asked by Christopher on March 11, 2009
  9. Math

    can someone please make me create a geometric sequence up to 5 terms? so that I can find the explicit formula for the nth term

    asked by Blank on February 24, 2019
  10. math

    1. Examine the first four terms in each of the following number sequences: *2, 7, 12, 17 my formula x+5 *7, 21, 63, 189, 567 my formula x(2)+x *1000, 850, 700, 550 my formula x-150 * –10, –6, –2, 2 my formula x+4 For each

    asked by cindy on June 17, 2016

More Similar Questions