how to derivate a polynomial with x , y and z terms
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Using the polynomial for r(t), create a new polynomial for the radial velocity v(t) using the
Matlab polyder() function, which takes a polynomial array as an argument, and returns a
new polynomial array representing the derivative of the initial array
If a have a function r(t)=sqrt( x(t))^2+ y(t))^2+ z(t))^2)
how polyder function would work in this case?