Exercise 5.c.1 from microeconomics theory by Andreu Mas-Colell: prove that, in general, if the production set y exhibits non decreasing returns to scale, then either ?(p) is greater or equal to 0 or ?(p) = +infinity

Exercise 5.C.1: Prove that, in general, if the production set Y exhibits nondecreasing returns to scale, then either a(p)