 
AP: Tn,Sn
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 d or the first two terms of an AP. 

You can then use the menu to find the n^{th}
term or the sum to n terms. 


The third option is to give
a ‘List of terms’. This will create a matrix with columns containing T_{n}
and S_{n}. 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. Memory may also be a problem for
large values of n if you have a number of other programs or notes on the
calculator. 


AP: Separate Tn
Given two separated terms (ie T_{7}=6
and T_{15}=30) this will find the values of a and d
defining the AP. 




