1 Avoid sweets and sugars. They aggravate the dumping syndrome. 2  Avoid very hot or cold foods or liquids, which may increase symptoms in some patients.  Stomach surgery is performed for different reasons, so calorie requirements may vary from patient to patient.
in mathematics an inverse function is a function that reverses another function if the function f applied to an input x gives a result of y then applying its inverse function g to y gives the result x and vice versa i e f x y if and only if g y x
In fact, the derivative of f -1 is the reciprocal of the derivative of f, with argument and value reversed. This is more or less obvious geometrically. You get the graph of the inverse of f from that of the function f by switching x and y axes. The derivative of anything is the change of the function (y) divided by the change of the argument, x.