HP 40gs - Manual (Page 275)

Step-by-Step Examples 16-1
16
Step-by-Step Examples
Introduction
This chapter illustrates the power of CAS, and the
Equation Writer, by working though a number of
examples. Some of these examples are variations on
questions from senior math examination papers.
The examples are given in order of increasing difficulty.
Example 1
If A is:
calculate the result of A in the form of an irreducible
fraction, showing each step of the calculation.
Solution: In the Equation
Writer, enter A by typing:
3 2 1
1 2
1
Now press to select the denominator (as shown
above).
Press to simplify the
denominator.
Now select the numerator
by pressing
.
3
2
--- 1 –
1
2
--- 1 +
------------
hp40g+.book Page 1 Friday, December 9, 2005 1:03 AM