the question is
Consider the function φ(x, n) defined as
Define a functional operator “phi” in order to evaluate φ(x, n) when we enter the command phi(x,n);.
Use Maple to draw a surface plot of this function for x ∈ [0,20] and n ∈ [1,20]. Your plot should have axes displayed and be fully labelled and titled.
so far i got this
somehow it just wont give me a 3d graph, it would only give me a graph with a single line on the right middie. could anyone give me any solution that would be greatful.
