1.

let x be 3,4,6,8 determine weather relation r = (x,f(x) belongs to x , f(x)=x squared plus 1 from x to n is a function or not

Answer»

A relation becomes a function, when every element in x has an unique pair in y or F(x) and there are no any EMPTY values in f(x)

So, if the x values are LIMITED to the given FOUR values, they have only unique mappings in f(x).
And if it EXTENDS to n, still it will behave as a function
And so this relation is a Function


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