问题描述: 求dy/dx=(x+y)^2的通解 1个回答 分类:综合 2014-12-12 问题解答: 我来补答 dy/dx = (x + y)²令t = x + y,dt/dx = 1 + dy/dxdt/dx - 1 = t²dt/dx = (1 + t²)dt/(1 + t²) = dxarctan(t) = x + C₁x + y = tan(x + C₁)y = tan(x + C₁) - x 展开全文阅读