已知x=1+t^2,y=t^2,则dy/dx

x=t^2+t y=ln(1+t) 求dy/dx y= ∫[0,x](t-1)^3(t-2)dt,dy/dx(x=0) f(x)为连续函数,∫(1-2)f(x)dx=1,F(t)= ∫(1-t)[f(y) ∫(y-t)f(x)dx]dy,则 已知 x=e^t ,dy/dx=dy/xdt .分析变换具体步骤 d^2y/dx^2=(d^2y/dt^2-dy/dt) 设x=3e^-t,y=2e^t,则dy/dx等于多少? 已知参数方程x=e^(2t)-1,y=2e^t,求dy/dx,d^2y/dx^2 设x=t+arctan t+1,y=t的立方+6t－2,求dy／dx 已知﹛x=7(t-sint),y=7(1-cost),则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