Цитата(Ярослав_ @ 10.5.2009, 14:09) *

int(xdx/(x+1))=int(dx)-int(dx/(x+1))=x-ln(x+1)+C и т.д....

int(x-ln(x+1)+C1)dx=intxdx-int(ln(x+1)dx+C1*intdx=(x^2)/2-(x+1)*ln(x+1)+C1+C2 ?