Exercise 3.2 Provide an upper bound of the Lagrange interpolation error for the following functions: fi(x) = cosh(2), f2(x)=sinh(x), cos(x) + sin(x), ƒ3 (x) = k =−1+0.5k, k=0,...,4, Xk = −π/2+πk/4, k = 0,...,4.

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