求微分的题目一道,x=e^(-t)sint,y=e^tcost,求 d^2y/dx^2
求微分的题目一道,x=e^(-t)sint,y=e^tcost,求 d^2y/dx^2
x=(e^t)sint y=(e^t)cost 求d^2y/dx^2
设x=1+t^2、y=cost 求 dy/dx 和d^2y/dx^2 sint-tcost/4t^3 和 sint-tc
L为参数方程x=cost+tsint y=sint-tcost 求曲线积分x+e^xdy+(y+ye^x)dx t为0到
设x=cost y=sint-tcost 求dy/dx
验证参数方程{x=e^t*sint y=e^t*cost 所确定的函数满足关系式(d^2y/dx^2)*(x+y)^2=
微分法~求 e^x + e^y = x^2 的 dy/dx
求y=sin(e^2x)的微分y'
高数题设x=(t+1)e^t,y=t^2*e^t,求d^2y/dx^2
设函数y=y(x)由x=1-e^t和y=t+e^-t确定,求dy/dx和d^2y/dx^2
Z=e(x-2y) X=sint Y等于T的平方 求dz/dt
求函数y=e^2x的微分dy