Spiegare e argomentare.
a.
$\int_3^5 f(x) \, dx = \int_1^5 f(x) \, dx - \int_1^3 f(x) \, dx = 6-4 = 2 $
b.
$\int_0^3 f(x) \, dx = \int_0^1 f(x) \, dx + \int_1^3 f(x) \, dx = 5+4 = 7 $
c.
$\int_5^0 f(x) \, dx = - (\int_0^1 f(x) \, dx + \int_1^5 f(x) \, dx) = -(3+6) = -9 $
d.
$\int_1^2 f(x) \, dx = bho?