Question

Matlab help please? So the problem wants us to draw the surface described by

f(x,y)= xy/(1+x2+y2)

bounded by x=1, x=4, xy=1, xy=4

Here's what I tried:
a=1; u=linspace(1,4,41); % x= u and y=u/v. u bounded by 1and 4 as x=u v=linspace(1/4,41); % v bounded by 1 and 4 as x(y) = v [u,v]=meshgrid(u,v); X=u; Y=v; Z=( v / (a + u.exp(2) + (u.exp(2)/v.*exp(2)))); surf(X,Y,Z)

But when I try to publish the problem, it gives me this error:

Error using + Matrix dimensions must agree.
Error in Math241Matlab (line 37) Z=( v / (a + u.exp(2) + (u.exp(2)/v.*exp(2)))
Anyone know what I'm doing wrong?