Calcolare
limx->0 (ex sin x - x(1 + x)) / x3.
Soluzione
limx->0 ((1 + x + x2/2 + x3/6 + o(x3))(x - x3/6 + o(x3)) - x - x2) / x3 =
limx->0 (x3/3 + o(x3)) / x3 = 1/3.
limx->0 (ex sin x - x(1 + x)) / x3.
limx->0 ((1 + x + x2/2 + x3/6 + o(x3))(x - x3/6 + o(x3)) - x - x2) / x3 =
limx->0 (x3/3 + o(x3)) / x3 = 1/3.