HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 218
Reduction Result, LINSOLVE, X AND Y AND Z
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hp40g+.book Page 36 Friday, December 9, 2005 1:03 AM 14-36 L1=2L1+L2 11 3 0 -2 -2 ENTER Reduction Result 20 4 0 -2 -2 then press ENTER. The following is then written to the Equation Writer: (x = −2) AND (y = −1) Example 2 Type: (2·X+Y+Z=1)AND(X+Y+2·Z=1)AND(X+2·Y+Z=4) Then, invoke LINSOLVE and type the unknowns: X AND Y AND Z and press the ENTER key. The following result is produced if you are in Step-by-step mode (CFG, etc.): L2=2L2−L1 2 1 1 -1 1 1 2 -1 1 2 1 -4 ENTER L3=2L3−L1 2 1 1 -1 0 1 3 -1 1 2 1 -4 and so on until, finally: Reduction Result 80 0 4 0 8 0 -20 0 0 -8 -4 Computer Algebra System (CAS)
14-36
Computer Algebra System (CAS)
L1=2L1+L2
ENTER
Reduction Result
then press ENTER. The following is then written to the
Equation Writer:
(x =
−
2) AND (y =
−
1)
Example 2
Type:
(2·X+Y+Z=1)AND(X+Y+2·Z=1)AND(X+2·Y+Z=4)
Then, invoke
LINSOLVE
and type the unknowns:
X AND Y AND Z
and press the ENTER key.
The following result is produced if you are in Step-by-step
mode (CFG, etc.):
L2=2L2
−
L1
ENTER
L3=2L3
−
L1
and so on until, finally:
Reduction Result
11
3
0
2
–
2
–
20
4
0
2
–
2
–
211
1
–
112
1
–
121
4
–
211
1
–
013
1
–
121
4
–
80
0
4
08
0
20
–
00
8
–
4
–
hp40g+.book
Page 36
Friday, December 9, 2005
1:03 AM