Spiegare i passaggi.
∫((x + 1)/(x^2 + 4)dx=
=∫(x/(x^2 + 4))dx + ∫(1/(x^2 + 4))dx=
=LN(x^2 + 4)/2 + ∫(1/(x^2 + 4))dx=
=LN(x^2 + 4)/2 + ATAN(x/2)/2=
=ATAN(x/2)/2 + LN(x^2 + 4)/2 +C
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