On the Direct Calculation of an Annuity

How to measure life?
Add one year
to one year,
Like a string of pearls,
each successive bead
diminishing slightly,
proportionally.
So that the change
is hardly noticeable
except from a distance.
Let your child weigh each pearl.
That is the weight of your necklace.



On the Calculation of a Perpetuity using Method of Geometric Series...