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Questions asked in IIT in 1986 and 1985
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Questions asked in IIT JEE in 1986,1985, base upon King rule, Queen rule and Odd even function

Manoj Chauhan is teaching live on Unacademy Plus

Manoj Chauhan
Maths faculty for IIT JEE (Main and Advance), Maths Specialist for Calculus, Ex Senior faculty Vibrant Academy,Top notch online faculty

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In last question discussed in this lecture, How can we apply open mapping theorem? The arguments in the question doesn't guarantee that the function is defined in a domain, but instead it only says function is defined in an open set. Open mapping theorem is applied only if a non constant function is defined on a domain. Am I missing any concepts?