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Hacemos las derivadas.
p'(x) = 2 a x + b; p''(x) = 2 a
f'(x) = e^(x - 1) + x e^(x - 1) = (1 + x) e^(x - 1)
f''(x) = e^(x - 1) + e^(x - 1) +x e^(x - 1) = (2 + x) e^(x - 1)
Tablas de valores:
p(1) = a + b + c; f(1) = 1
p'(1) = 2 a + b; f'(1) = 2
p''(1) = 2 a; f''(1) = 3
Igualamos:
2 a = 3; a = 3/2
3 + b = 2; b = - 1
3/2 - 1 + c = 1; c = 1/2
p(x) = 3/2 x^2 - x + 1/2,
Saludos Herminio