HP HP-15C - Page 185

Section 13: Finding the Roots of an Equation 185
Keystrokes
Display
“
005– 16
 t / 20.
'
006– 12
“
007– 16
 e
 t / 20
.
1
008– 1
+
009– 40
1  e
 t / 20
.
5
010– 5
0
011– 0
0
012– 0
0
013– 0
*
014– 20
5000 (1  e
 t / 20
).
®
015– 34
Brings another t-value
into X-register.
2
016– 2
0
017– 0
0
018– 0
*
019– 20
200t.
-
020– 30
5000(1  e
 t / 20
)  200t.
| n
021– 43 32
Switch to Run mode, key in two initial estimates of the time (for example, 5
and 6 seconds) and execute _.
Keystrokes
Display
|¥
Run mode.
5 v
5.0000
Initial estimates.
6
6
´_A
9.2843
The desired root.
Verify the root by reviewing the Y- and Z-registers.
Keystrokes
Display
)
9.2843
A previous estimate of the root.
)
0.0000
Value of the function at the root
showing that h = 0.