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प्रश्न
What is the necessary and sufficient condition for a function to be invertible?
पर्याय
It must be bijective.
It must be constant.
It must be one-one only.
It must be onto only.
MCQ
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उत्तर
A function is invertible if and only if it is bijective. Being both one-one and onto guarantees that an inverse function exists on the stated domain and codomain.
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