The Lagrange polynomial:
L(x) =
k
y
i
g
i
(x)
Σ
i = 1
Basis polynomials:
g
i
(x) =
k
x - x
j
x
i
- x
j
Π
j = 1, j ≠ i
Linear member of the sum:
x - x
j
=
x
-
x
j
, where c
ij
= x
i
- x
j
x
i
- x
j
c
ij
c
ij
←
→