This is a question of class 12, mathematics, functions

).²Function which is Many- one function (Not Injective) and also Onto function (Surjective Mapping) is called Many one Onto function. In Many-One function (f:A→B) two or more elements of set A have the same f image in B. Whereas in Onto function (f:A→B), each element in B is the f-image of atleast one element in A. Example: f(x) = sqrt(1+x