question : maximize and minimized the object function C= 2x+y.

i saw a sentence "The feasible region is unbounded and the coefficients of objective function are negative - Then it will have minimum but no maximum " .

but in this question i got it have maximum, but no minimum.

so is it the sentence incorrect or did i do wrong?

C= 2x + y subject to x y > 0 x > 4 x