If f(x)=1/x and g(x)=0 are two real func...

If `f(x)=1/x` and `g(x)=0` are two real functions, show that `fog` is not defined.

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domain `(fog)=` domain of `f` `cap` range of `g`
`=(R-{0}) cap 0`
Hence domain `(fog)` is an empty set. So `fog` can not be defined.

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