=Integral
Reemplazar u=raíz t
u^2=t
dt=2udu
=Puntos
=2 Puntos
=2 Puntos
=2[Entero
= 2[ u | lt; 0, 2 gt; -4 *(1/2)arctan(u/2)| 0, 2 gt;]
=2[2-2*(arctangente 1- arcotangente 0 )]
= 4-4 *π/4
= 4π
14.
f(x)=sinxln (1 e^x)
f(-x)=sin(-x)ln(1 e^(-x))
=-sinx ln[e^(- x) (1 e^x]
=-Cincinnati [e^(-x)] ln(1 e^x)}
=xsinx-sinxln(1 e^x )
Integral original = integral
El primer término y =-x, x =-y
=integral
=integral
p>
=integral
=integral
= x(-cosx)| 0, 1 gt integral < 0, 1 >cosx; dx
=-cos1 sen1