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Texas Instruments TI-89 Tip List

Texas Instruments TI-89
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Exit
EndIf
EndFor
ú[k]y
(ù[2]^2/4-ù[3]+y)r
If r=0 Then
(3*ù[2]^2/4-2*ù[3]+2*(y^2-4*ù[5]))d
(3*ù[2]^2/4-2*ù[3]-2*(y^2-4*ù[5]))e
Else
(3*ù[2]^2/4-r^2-2*ù[3]+(4*ù[2]*ù[3]-8*ù[4]-ù[2]^3)/(4*r))d
(3*ù[2]^2/4-r^2-2*ù[3]-(4*ù[2]*ù[3]-8*ù[4]-ù[2]^3)/(4*r))e
EndIf
{ù[2]/4+r/2+d/2,ù[2]/4+r/2-d/2,ù[2]/4-r/2+e/2,ù[2]/4-r/2-e/2}
EndFunc
coef():
coef(è,ý)
Func
©~coef(p,v) Make list of coefficents
p - polynomial
v - independent var
Local ù,é,ì
If getType(ý)"VAR":Return "p\coef:2nd arg must be a VAR"
If inString(string(è),"=")>0 Then
left(è)é
Else
èé
EndIf
é|ý=0ù[1]
1→ì
Loop
(é,ý)é
If getType(é)="NUM" and é=0:Exit
ì+1→ì
augment({(é|ý=0)/((ì-1)!)},ù)ù
EndLoop
ù
EndFunc
evalrt():
evalrt(l)
Func
©~evalRt(ls) Evaluate Roots
ls - list of roots
Local i,n,o,s,f
If getType(l)"LIST": Return "p\evalRt:Arg must be a LIST"
dim(l)n
{}o
0f
For i,1,n
If inString(string(l[i]),"=")>0 Then
If f=0 Then
l[i]s
1→f
Else
s and l[i]s
6 - 11

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Texas Instruments TI-89 Specifications

General IconGeneral
Display size (HxV)100 x 160 mm
Memory type639K FLASH ROM, 188K bytes RAM
Compatible operating systemsOperating System 2.09
Battery typeAAA

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