HP HP-15C - Page 237

Appendix D: A Detailed Look at _ 237
Again, use the same initial estimates to find the next root.
Keystrokes
Display
|¥
0.0000
Run mode.
10 “ v
–10.0000
Same initial estimates.
20 “
–20
´ _ 2
8.4999
Third root.
O 2
8.4999
Stores root for deflation.
) )
–1.0929 –07
Deflated function value near
zero.
Now change your subroutine to eliminate the third root.
Keystrokes
Display
|¥
000–
Program mode.
| ‚ |
‚
034–
10
Line before n.
®
035–
34
Brings x into X-register.
l 2
036-
45 2
-
037–
30
Deflation for third root.
÷
038–
10
Find the fourth root.
Keystrokes
Display
|¥
–1.0929 –07
10 “ v
–10.0000
Same initial estimates.
20 “
–20
´ _ 2
8.5001
Fourth root.
O 3
8.5001
Stores root for reference.
) )
–0.0009
Deflated function value
near zero.