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The relation 'f' is defined by: f(x) = {...

The relation 'f' is defined by: `f(x) = {(x^(2)","0 le x le 3),(3x" ,"3 le x le 10):}`. The relation g is defined by `g(x) = {(x^(2)"," 0 le x le 2),(3x"," 2 le x le 10):}`
Show that f is a function and g is not a function.

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