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GP:Tn, Sn, Sinf 
When you run the program the highlight will initially be on the ‘Define Seq.’ option, since that is the first thing that must be done. 
You then have a choice of supplying either a and r or the first two terms of an GP.

You can then use the menu to find the nth term, the sum to n terms or the sum to infinity (if it exists).

The third option is to give a ‘List of terms’. This will create a matrix with columns containing Tn and Sn. The matrix will be deleted after being displayed to save memory. Matrix M0 will be overwritten by this. For large values of n, this can take a minute or so to complete. 

GP: Separate Tn 
Given two separated terms (ie T6=8192000 and T12=2147483.648) this will find the values of a and r defining the GP.

y=a*b^x (2 pts) 
Given two points in (x,y) form, this program will find the equation of the GP in the form y=a*bx.

The rate of increase is also given as a percentage for use in financial or population growth problems.

Last modified: 19 Dec 2007                                             Sitemap        Home        Contact Me