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Recall that (by the Fundamental Theorem of Algebra) the only polynomial P(t) of degree n−1 that...

Recall that (by the Fundamental Theorem of Algebra) the only polynomial P(t) of degree n−1 that vanishes at n distinct points t1,...,tn ∈ R is P(t) ≡ 0. Using this, show that given any values b1,...,bn ∈ R, there is a polynomial Q(t) = ξ1 + ξ2t + ... + ξntn-1 such that Q(ti) = bi (and thus Q(t) takes precisely the given values at the given points). Hint: Show that the coefficient matrix of the corresponding system is nonsingular.

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