Exercises

Plot the function (for x=0 to 7) and find the volume of revolution about the x and y axes

1. 

   f:=x^3*ln(5*x)
plot(f, x=0..7)
xvol:=int(Pi*f^2, x=0..7)
xvol_num:=evalf(xvol)
yvol:=int(2*Pi*x*f, x=0..7)
yvol_num:=evalf(yvol)