prove that the lagrangian coefcient polynomials


Prove that the Lagrangian coef?cient polynomials for pn(x) satisfy ∑n k=0 lk(x) = 1.

Hint: It is only a 3-line proof. Consider the interpolating polynomial for a constant function f.

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Engineering Mathematics: prove that the lagrangian coefcient polynomials
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