x=t^3+t-1 y=3-2t^2 dy/dx|t-1 等于多少

设x=3e^-t,y=2e^t,则dy/dx等于多少? y= ∫[0,x](t-1)^3(t-2)dt,dy/dx(x=0) x=t^2+t y=ln(1+t) 求dy/dx 设x=t+arctan t+1,y=t的立方+6t－2,求dy／dx 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 y=y(x)由参数方程x=2t/(1+t^);y=(1-t^2)/1+t^2确定,求dy/dx 参数方程x=(t-1)e^t,y=1-t^4,求dy/dx x=2(cot t),y=2(sin²t),用t表示dy/dx x=2t+cost y=t+e^t 求dy/dx 设 {x=2t^3+2 y=e^2t-1 ,求dy/dx,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 y=1+xe^y,求dy/dx.参数方程x=e^-t,y=3t,求dy/dx.求∫1/x+x².