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Metode Numerik 2 - Universitas Indonesia

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Contoh, interpolasi Lagrange kubik:<br />

∏<br />

∏<br />

∑ ∑<br />

≠<br />

≠<br />

= =<br />

⎟<br />

⎟<br />

⎠<br />

⎞<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

−<br />

−<br />

=<br />

⎟<br />

⎟<br />

⎠<br />

⎞<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

−<br />

−<br />

=<br />

=<br />

j<br />

s s<br />

j<br />

s<br />

j<br />

i<br />

k k<br />

i<br />

k<br />

i<br />

3<br />

0<br />

i<br />

3<br />

0<br />

j<br />

j<br />

i<br />

j<br />

i<br />

y<br />

y<br />

y<br />

y<br />

)<br />

y<br />

l(y,<br />

x<br />

x<br />

x<br />

x<br />

)<br />

x<br />

l(x,<br />

)<br />

y<br />

,<br />

)f(x<br />

y<br />

l(y,<br />

)<br />

x<br />

l(x,<br />

y)<br />

p(x,<br />

77

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