Results 1 to 2 of 2

Math Help - Geometric equations with variable terms

  1. #1
    Newbie
    Joined
    May 2009
    Posts
    5

    Geometric equations with variable terms

    Hello,

    I'm not sure if my title is correct terminology but I am stuck. I can work out a geometric progression easily and use the equations. Unfortunately when the equation includes a term that relies on the value of another, I am confused.

    What do I do in said situation? Say there are three terms, a + b + c, the value of b is a to a power and c is an exact value.

    What sort of steps would I take to work backwards to get the value?

    GPn = a * ratio^n-1

    Thanks,
    Unmath Sam
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member apcalculus's Avatar
    Joined
    Apr 2009
    From
    Boston
    Posts
    293
    Quote Originally Posted by Unmath Sam View Post
    Hello,

    I'm not sure if my title is correct terminology but I am stuck. I can work out a geometric progression easily and use the equations. Unfortunately when the equation includes a term that relies on the value of another, I am confused.

    What do I do in said situation? Say there are three terms, a + b + c, the value of b is a to a power and c is an exact value.

    What sort of steps would I take to work backwards to get the value?

    GPn = a * ratio^n-1

    Thanks,
    Unmath Sam
    I am not sure I understand your question correctly. Are you referring to recursive forms of sequences? The recursive form of the geometric sequence should be:

    a_n = r a_(n-1) where r is the ratio, otherwise it would not be a geometric sequence.

    If you would share a specific problem we may be able to help answer your question.

    good luck!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Geometric Progression - Sum it upto n-terms
    Posted in the Algebra Forum
    Replies: 1
    Last Post: June 24th 2010, 12:05 AM
  2. RREF for 3-Variable Equations with Geometric Ratios
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: May 26th 2010, 04:50 PM
  3. Geometric and Arthmetic terms
    Posted in the Algebra Forum
    Replies: 2
    Last Post: April 8th 2009, 04:29 PM
  4. How many terms in a geometric series
    Posted in the Algebra Forum
    Replies: 4
    Last Post: April 2nd 2008, 06:59 PM
  5. Terms Geometric
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: January 18th 2008, 11:44 AM

Search Tags


/mathhelpforum @mathhelpforum