HP 10413 Datasheet Page 257
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257
46
2
46 46
or
22
5 or 1
x
±
=
+
−
=
=−
Eg. Solve
2
450xx−−=
Use QUAD(X
2
-4X-5,X)
Answer: (4+S1*6)/2
It is now up to you to interpret this algebraically as:
If you are simply after the roots of the quadratic then it is far better to use the
POLYROOT function (page 284). If you would like a solution such as
35
2
+
rather than 2.6180 then the advantage of QUAD is that you can COPY the
result, edit the line to remove all but the decimal root and square it to find the
original discriminant.
The QUAD function does have one advantage
over other methods, in that it will give a
complex number solution to quadratics which
have complex roots. This may well make it
worth using in problems where a complex
answer is acceptable or required. Complex numbers are expressed on the
hp 39g+ in the form (a, b) representing a + bi. Thus the answer to the
second quadratic shown above would represent
2 112
6
−± −
with the 112−
written as a complex number.
See also: FNROOT, LINEAR?
QUOTE(var.name)
Intended for use mainly by programmers. Programmers sometimes want to
store a function such as X
2
-4 into one of F1(X)…F9(X) using . It turns
out that if you use F1(X
2
-4) then it won’t be entered symbolically. Instead,
the contents of X (a number) is entered substituted and the expression
evaluated to give a numeric result. The QUOTE function fixes this. For
example, QUOTE(X)
2
-4 F1(X) will ensure a symbolic result.
An easier method of storing a function into an aplet in a program is to
enclose it in single quotes. For example '(X)
2
-4' F1(X) would serve the
same purpose as QUOTE(X)
2
-4 F1(X). On the other hand, entering
F1('X') will not work but F1(QUOTE(X)) will. See Example 1 on page 217
in the chapter “Programming on the hp 39g+” for an example of use.
- Mastering the hp 39g+ 1
- Table of Contents 2
- 76yx x x=−−+ 16
- √35. The 25
- HOME too 27
- Standard mode, very 31
- −− then 33
- 3, 1TT==and 46
- →) into 47
- √(5+Ans) 50
- ENTER will 52
- (-) which is in the same row 55
- The cursor 61
- …and at the 61
- Move to about 63
- it is a 66
- 111xx+−+− 71
- XX= then 3( ) 1( 2( )) 72
- XFFX= will show 72
- 13 13x−≤≤ and 75
- = using 75
- (,, , )a b function X 80
- 1( ) 1FX X 81
- − and then 81
- () 0.5 1gx x=−from x = -2 to 84
- ≥ -2 AND X ≤ 1) 85
- 285 10⋅× then 1/X is 89
- 2 5087719298 10 89
- × . When you 89
- All the normal function 93
- 1( ) 1FX X=− & 94
- 65 65X−≤≤ 97
- . If you wish to 100
- ≤ to 05t 101
- ≤ gives a graph that 101
- () 2 5 2 3vt t t t 104
- 1( ) 4 cos(3 )R 106
- = 2( ) 0.5R 106
- 3( ) 3 2sin(10 )R 106
- T = . If you type it in 107
- 2 1475 10⋅× 109
- 14 29⋅ . This means, of 111
- 16 67⋅ 114
- 252fx x x x=− −+ 115
- 2, , ^ 3 , 4AX X X−= 117
- BC B+=⋅ 118
- *5*AB C B+=⋅ becomes 119
- 2vu ad=− 120
- Σ(I=1,20,RANDOM<0 130
- 0.8199 1.1662yx=+ 139
- 0.693147 142
- YX=⋅ +⋅ earlier would use 146
- Competitor Time 147
- N and of k 148
- N and k 148
- Sample t value is 152
- ↑ and ↓ keys. The size of 165
- → and ← keys 165
- 1.2Px≤ ” 193
- PX x≤ , E9 giving 194
- • HP39/40G (Wire) 198
- • Disk drive… 198
- • Choose the parent aplet; 212
- SETVIEWS 214
- the PLOT 222
- the PLOT view has 222
- VIEWS to see the menu.” 224
- HP39DIR.CUR 226
- HP39DIR.000 226
- (2)(31)xx 244
- −− has been expanded on the 244
- 45 23 17 248
- 4 8723 10⋅× 249
- 0 8199 1 1662YX=⋅ +⋅ 254
- 450xx−−= 257
- 0.0000003 260
- + could be entered into the 262
- {list}) 265
- ∆LIST(L1)={3,3,3,3} 266
- 1x − = 63 269
- (3,4,0) or 4 271
- , , ,...xxx 277
- () 7 6fx x x=−+ 277
- −+−=−+ we 279
- C using the formula 280
- RANDSEED 281
- ()01Px x>=⋅ 282
- () 2 2 1gx x x 284
- POLYROOT 285
- () 4 6fx x x x=− ++… 286
- 5 4 32 23 4 5 290
- N and k and store 292
- 32 0z −=, setting the other 295
- 5sin 5cosri j 297
- 'lim 303
- +++ and 304
- ,: 0.51 1xy y x y x 307
- ≤X AND X≤1) 308
- MAXREAL of 309
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