向量函数题目
Let x=t^5,y=t^4,z=t^3,t∈R.Find the equation of tangent to the curve at (1,1,1).
大概意思就是：令x=t^5,y=t^4,z=t^3,t∈R，求该曲线在点(1,1,1)处的切线方程。