Which one of the following functions is not homogeneous ?

Options

A. (a) `f(x,y)=x[log` `sqrt(x^2+y^2)` `-log y] +` `ye^(x/y)`
B. (b) `f(x,y)=x^(1//3) y^(-2//3) tan^(-1) (x/y)`
C. (c) `f(x,y)=x[log sqrt(x^2+y^2)-log y ] + ye^(y/x)`
D. (d) `f(x,y) =x [log ((2x^2-y^2)/x)-log (x+y)] + y^2 tan ((x+2y)/(3x-y))`

Answer

D