∫dx/[(1+x^2)^(3/2)]
问题描述：
∫dx/[(1+x^2)^(3/2)]
答
dwadwadawdasdawd
答
令x=tant,-π/2
∫dx/[(1+x^2)^(3/2)]
dwadwadawdasdawd
令x=tant,-π/2