解
∫4/(1-2x)²dx
=-2∫1/(1-2x)²d(1-2x)
=-2∫1/u²du
=2/u+C
=2/(1-2x)+C
∫1/(3x+5)dx
=1/3∫1/(3x+5)d(3x+5)
=1/3∫1/udu
=1/3ln|u|+C
=1/3ln|3x+5|+C
解
∫4/(1-2x)²dx
=-2∫1/(1-2x)²d(1-2x)
=-2∫1/u²du
=2/u+C
=2/(1-2x)+C
∫1/(3x+5)dx
=1/3∫1/(3x+5)d(3x+5)
=1/3∫1/udu
=1/3ln|u|+C
=1/3ln|3x+5|+C