∫2x/(x2-x+6)dx=?
2个回答

∫2x/(x²-2x+6)dx

=∫[2(x-1)+2]/[4+(x-1)²]dx

=2∫[(x-1)/[4+(x-1)²]dx+2∫1/[4+(x-1)²]dx

=2∫[(x-1)/[4+(x-1)²]d(x-1)+2∫1/[4+(x-1)²]d(x-1)

=∫[1/[4+(x-1)²]d(x-1)²+2∫1/[4+(x-1)²]d(x-1)

=∫[1/[4+(x-1)²]d[4+(x-1)²]+2∫1/[2²+(x-1)²]d(x-1)

=ln[4+(x-1)²]+arctan[(x-1)/2]+C