Question

if gof is one one function then are f and g necessarily to be one one function?​

Answer 1

Answer:

f:{1,2,3,4}={1,2,3,4,5,6} defined as f(x)=x∀x

g:{1,2,3,4,5,6}→{1,2,3,4,5,6} as g(x)=x

and g(5)=g(6),gof(x)=x which shows gof is one-one g is not one-one.

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