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interpolacion2
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Franco Mendoza
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Pn(x)=a0+a1(x-x0)+a2(x-x0)(x-x1)+a3(x-x0 Ejemplo x f (x )
8.1 16.9441
8.3 1.!49"
Hallar f(8.4) aplicando polinomio interpolador de Neton
n $
#n 8.1
f(#n) 16.9441 3.$"!!
1
8.3
1.!49" 3.186!
"
8.6
18.!$!1! $.3$"
3
8.
18.!3!3!
%E&'*D+ P3= 16.9441+3.0255*(x-8.1)+0.3 16.9441+3.0255*(x-8.1)+0.322*(x-8.1).*(x-8.3)-12.5554*(x 22*(x-8.1).*(x-8.3)-12.5554*(x-8.1). -8.1). ,n-,3(8.4)
1.9364"!
P n(x) = L 0(x)f(x 0 ) + L1 f(x 1 ) + ... + Ln(x)f(x n ) =
Ejemplo x f(x)
8.1 16.9441
8.3 1.!49"
!nc"entre el polinomio de interpolaci#n de $rado 3 con lo% %i$"ie n
#n
f(#n)
(#n)
$
8.1
16.9441
$.1
1
8.3
1.!49"
$.!
"
8.6
18.!$!1!
$.6
3
8.
18.!3!3!
$."!
,n-,3-f(x$)2(x$)f(x1)2(x1)f(x")2(x")f(x3)2(x3)
%esltado
,3(8.4)
1.93643
Diferencias Divididas (Interpolación) (x-x1)(x-x2)(x-x3) +…
8.6 18.!$!1!
8. 18.!3!3!
$.3"" 1".!!!4166 ."11"!
*(x-8.3).*(x-8.6)
/todo de a0ran0e ,olinomio Interpolador
8.6 18.!$!1!
8. 18.!3!3!
te% p"nto% & aproxime f(8.4) f(#n)2(#n) 1.694 13.16" 11.1$3 4.634
Compararemos e método con el an
,olinomio Interpolador
a$ a1 a" a3
16.944 3.$"! $.3"" 1".!!!4
5alor de #
8.4
resultado que saldrá mediante este terior. Usaremos el mismo ejemplo
Valor de X
8.4
Ejemplo x fx!"lo#x!
1 $
1.5 $.1%&$'
Halle "n alor aproximado de lo$(2.2) "%ando "n n $ 1 * + 4 5 &
Xn 1 1.5 * *.5 + +.5 4
fx! $ $.1%&$' $.+$1$+ $.+'%'4 $.4%%1* $.544$% $.&$*$&
,esultado
-n"-&*.*5!
$.+5*1&51*%
Valor ,eal
' pto% de inter%ecci#n alor de * !rror ,%ol"to
(Xn! $.$$% )$.$&8 $.51+ $.&84 )$.1%1 $.$41 )$.$$5
lo#*.*5! " $.+5*18*51
2.2 f(2.2)-P(2.2)
0.00001/383
Para allar el error de ac"erdo a la f#rm"la matemtica ((+1))(c) = ((/))(c) ---- !=(f((n+1) ) 5(c)6(x7x0)6(x
(5x7x5 n))(n+1)9
,plicando la f#rm"la E*.*5!
1.%51&&8'%5*E)$$5
* $.+$1$+
*.5 + +.5 4 $.+'%'4 $.4%%1* $.544$% $.&$*$&
olinomio de to $rado & alle el error. (Xn!fX! $ )$.$1* $.154 $.*%* )$.$8* $.$** )$.$$+
f*.*5!
:omamo%;
7x1)5 …
$.+5*18*5
alor de c
2.3
7lclo de l /ea0 x <(x)
0 0
1 3.2
2 4.8
Hallar la elocidad de %ediment
onde0 *; >oncentraci#n ol"m?trica <(x); elocidad de @edimentaci#n n $
X $
fX! $
1
1
+.*
C 0 +.*
C1
)$.8 1.&
*
*
4.8
)1.$%5 )$.55
+
+
4.*5
)$.*+5 )1.$*
4
4
+.*+
$.++ )$.+&
5
5
*.8%
$.1* )$.1*
&
&
*.%5
$.$+5 )$.$5
%
%
*.%
)*.**$4E)$1& )$.$5
8
-n"-8 ,esultado
-8*.5!
8
*.&5
P8= 0 +3.2A(x-0)-0.8A(x-0)A(x-1)-0.0B1/A(x-0)A(x-1)A(x-2)
4.%1$*
velocidad de sedimentación
3 4.2
4 3.23
2.8/
2./
/ 2./
8 2.
aci#n para la concentraci#n de 2.
C2
C3
C4
C
C
C/
)$.$'1&&&% $.$'*'1&% $.*8
)$.$*+1&&% )$.$**'1&%
$.188++++
$.$$*4%** )$.$$8++++
)$.$&458++ )$.
%$$.$$$*$*4 $.$$+888'
$.$15 $.$1$41&%
)$.$*8++++
)$.$$$14+1 )$.$$$'4*5
)$.$$*%$8+ )$.$$1*5
$.$$41&&% )$.$11&&&%
0.0B2B1/A(x-0)A(x-1)A(x-2)A(x-3)-0.0231/A(x-0)A(x-1)A(x-2)A(x-3)A(x-4)+0.002
Valor de X
*.5
4/22A(x-0)A(x-1)A(x-2)A(x-3)A(x-4)A(x-)+0.00020238A(x-0)A(x-1)A(x-2)A(x-3)A(x-
)A(x-)A(x-)-0.0000B2A(x-0)A(x-1)A(x-2)A(x-3)A(x-4)A(x-)A(x-)A(x-/)
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