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Show that if f: A to B and g: B to C are...

Show that if `f: A to B` and `g: B to C` are onto, then gof : `A to C` is also onto.

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The correct Answer is:
gof is onto.
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SUBHASH PUBLICATION-RELATIONS AND FUNCTIONS -THREE MARKS QUESTIONS WITH ANSWERS
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  10. Show that if f : A to B and g: B to C are one-one, then gof: A to C is...

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