∫x+5/x²-6x+13 dx
=∫（x-3+8）/（x²-6x+13） dx
=∫(x-3)/(x²-6x+13)dx+8∫1/[(x-3)²+2²]dx
=1/2ln(x²-6x+13)+8/2 arctan(x-3)/2+c
=1/2ln(x²-6x+13)+4 arctan(x-3)/2+c
求积分：∫x+5/x²-6x+13 dx
∫x+5/x²-6x+13 dx
=∫（x-3+8）/（x²-6x+13） dx
=∫(x-3)/(x²-6x+13)dx+8∫1/[(x-3)²+2²]dx
=1/2ln(x²-6x+13)+8/2 arctan(x-3)/2+c
=1/2ln(x²-6x+13)+4 arctan(x-3)/2+c