急,求不定积分In(x^2+1)dx ∫下面是0 上面是3

问题描述:

急,求不定积分In(x^2+1)dx ∫下面是0 上面是3

∫(0,3)ln(x²+1)dx=xln(x²+1)|(0,3)-∫(0,3)xdln(x²+1)=3ln10-∫(0,3)2x²/(x²+1)dx=3ln10-2∫(0,3)(x²+1-1)/(x²+1)dx=3ln10-2∫(0,3)[1-1/(x²+1)]dx=3ln10-2∫(0,3)...