考研高数难题(考研高数难题例题) 考研数学,高数,微分方程,问题如图x = 0 时,微分方程无解。x ≠ 0 时,记 p = dy/dx, 则微分方程变为 xdp/dx = -(1/2) √(1+p^2),dp/√(1+p^2) = -(1/2)dx/x 令 p = tanu,则 secudu = -(1/2)dx/x 初始条件...