HP HP-15C - Page 15

Section 1: Using [SOLVE | Effectively
13
Keystrokes
mrTBLifAi
|RCL|4
E
|RCL|3
s
s
|RCL|2
E
E
|RCL|1
0
S
IRCLIO
Display
001-42
002-
003-
004-
005-
006-
007-
008-
009-
010-
011-
012-
013-
014-
015-
,21,11
45 4
20
45 3
40
20
45 2
40
20
45 1
40
20
45 0
40
43 32
In Run mode, key in the five coefficients:
Keystrokes Display
4. 2725 fx] 8 [CHS]
4.2725
4.2725
1.9931
1.0229
0.0010
3.7680
0.3768
2.8806
-08
-08
-05
-03
-01
Run mode.
Coefficient of t4.
Coefficient of t\t of £•.
Coefficient of t.
Constant term.
1.9931 |CHS||EEX|
5|CHS|[STOl3
1.0229rEEXl3|CHS|
|STO|2
3.7680|EEX|1 |CHS|
|STO|1
2.8806rCHSl|STO|0
Because the desired solution should be between 1 and 32, key in
these two values for initial estimates. Then use [SOLVE | to find the
roots.
Keystrokes Display
1 [ENTER! 1.0000
32 32 Initial estimates.
[Til SOLVE | [A] 7.5137 Root found.
7.5137 Same previous estimate.