HP HP-65 - A Compound Growth Schedule

3
2
1
4 3
key B[] E[FD @R B[R]
Notice that using four times leaves the stack in its original
condition.
Recalling 77
7is a fixed constant provided in your HP-65. Merely press
{81 whenever you need it in a calculation.
Sample Case: Calculate the area of a circle with a radius of 3.
Area — 732,
Press See Displayed Comment
| B Recall mto X
3 [ENtERd [x] 5.00 Calculate 3 X 3
X - Answer 9 X T
Innovative Use of Calculator —
A Compound Growth Schedule
There is considerable room for innovation and creativity in using
HP pocket calculators. Our customers have amazed us by solving
problems using highly original manipulations on the calculator.
Here is such a routine to calculate a geometric series, showing
the compound growth of invested capital.
A geometric series is a set of numbers in which each term is cal-
culated by multiplying the previous term by some factor. For
example: 4, 8, 16, 32, etc. In this case, the factor is 2. In the
practical world, the growth of $1000 invested at 10% per period
would constitute a geometric series in which the first term is 1000
and the growth factor is 1.10. Our customer’s solution to gener-
ating the series was: