Let f (x) = x3 − e−x,                             x0 = 0.5,    x1 = 0.7,    x2 = 1.0. Find the Lagrange Polynomial, P2(x), of degree at most 2 for f (x) using x0, x1, x2. Evaluate P2(0.8) and compute the actual error |f (0.8) − P2(0.8)|

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