HP HP-15C - Page 236

236 Appendix D: A Detailed Look at _
Return to Program mode and add instructions to your subroutine to
eliminate the root just found.
Keystrokes
Display
|¥
000-
Program mode.
| ‚ |
‚
026–
30
Line before n.
®
027–
34
Brings x into X-register.
l 0
028–
45 0
Divides by (x  a), where
a is known root.
-
029–
30
÷
030–
10
Now use the same initial estimates to find the next root.
Keystrokes
Display
|¥
4.0000 -06
Run mode.
10 “ v
–10.0000
Same initial estimates.
20 “
–20
´ _ 2
0.4000
Second root.
O 1
0.4000
Stores root for deflation.
) )
0.0000
Deflated function value.
Now modify your subroutine to eliminate the second root.
Keystrokes
Display
|¥
000-
Program mode.
| ‚ |
‚
030– 10
Line before n.
®
031– 34
Brings x into X-register.
l 1
032– 45 1
-
033– 30
Deflation for second root.
÷
034– 10