a relation f is defined by f: x --- x2 - 2 where x belongs {-1 ,-2 , 0 , - Maths - Relations and Functions

Question

a relation f is defined by f: x --->x2 - 2 where x
belongs {-1 ,-2 , 0 , 2 }
1) list the elements of f
2)is f a function ?

Vishvesh Kumar · Accepted Answer

Given f:x→x2-2     where x∈{-1,-2,0,2}1) Elements of f ={x2-2 :  x∈{-1,-2,0,2} } =-1,-1,-2,2,0,-2,2,22) Since no 2 ordered pairs in f have the same first component, so f is a funtion

a relation f is defined by f: x --->x2 - 2 where x belongs {-1 ,-2 , 0 , 2 }1) list the elements of f 2)is f a function ?

a relation f is defined by f: x --->x² - 2 where x belongs {-1 ,-2 , 0 , 2 }
1) list the elements of f
2)is f a function ?