Hint: Apply the rank-nullity theorem to the linear map Pn → Rn+1 that sends p ?→
(p(x0), . . . , p(xn)). Then use the fact that if polynomial of degree ≤ n has n + 1 distinct roots, then it is the zero polynomial.
Hint: Apply the rank-nullity theorem to the linear map Pn → Rn+1 that sends p ?→...
Part I: Show that (y − y ∗ 0 )(y − y ∗ 1 ). . .(y − y ∗ n ) = 5 n+1 2 n Tn+1(x), where x = y/5 Part II: It can be shown that there exists R > 0 such that |f (n) (y)| ≤ Rn for all y ∈ [−5, 5]. Assuming this, show that limn→∞ max{|f(y) − Pn(y)|, y ∈ [−5, 5]} = 0 Ij = COS Problem 1: Recall that the Chebyshev...