急,计算积分∫(x+1)/(x^2+4x+13)dx
问题描述:
急,计算积分∫(x+1)/(x^2+4x+13)dx
答
∫(x^3+4x^2+13x+x^2+4x+13)dx
∫(x^3+5x^2+17x+13)dx
x^4/4+5x^3/3+17x^2/2+13x