HP 40gs User Manual page 282

hp40g+.book Page 8 Friday, December 9, 2005 1:03 AM
Second method
Exercise 6
16-8
Press again to
simplify the result to
Y = 2X+5.
Type:
(-3,-1 )-(-1,3)
The answer is –(2+4i).
With the answer still
selected, apply the ABS
command by pressing
.
2 5
Pressing gives
method 1 above.
You can also determi1ne the equation of the line
typing:
DROITE(( -1,3), (-3,-1))
Pressing then gives the result obtained before:
Y = –(2X+5).
In this exercise, we consider some examples of integer
arithmetic.
Part 1
For n, a strictly positive integer, we define:
n
×
a = 4 10 – 1 b , = 2 10
n n
1. Compute a , b , c , a
1 1 1
2. Determine how many digits the decimal
representations of a
n
and c are divisible by 3.
n
3. Using a list of prime numbers less than 100, show
that b is a prime.
3
, the same answer as with
n n
× ×
– 1 , c = 2 10 + 1
n
, b , c , a , b and c .
2 2 2 3 3 3
and c can have. Show that a
n
Step-by-Step Examples
AB
by
n