Exercises on Introduction to Abstract Algebra I

[@samuelkumi4128]

Thanks sir

[@drstephenmoore]

share with your colleagues.

[@adamusanunu2630]

Thank you sir

[@drstephenmoore]

share link with your mates

[@jamjam3448]

@@drstephenmoore it's in the whatsapp group

[@MichaelOppong-p8z]

Please does it mean we can check for surjectivity by finding out whether the given function has an inverse of not?

[@abynahbhlayh]

My exact question too

[@MichaelOppong-p8z]

well we never got a reply😂@@abynahbhlayh

[@drstephenmoore]

Yes, checking for the existence of an inverse function is one way to examine the surjectivity of a given function, but it's important to clarify that this method specifically addresses both injectivity (one-to-one-ness) and surjectivity (onto-ness) of functions, especially in the context of functions between sets of the same size.

[@Reindolf-ih3ug]

Sir please when determining the identity element, can I check for only maybe a*e=a and leave e*a=a for the sake of time like you did Q7?

[@drstephenmoore]

@@Reindolf-ih3ug no

[@Reindolf-ih3ug]

Sir please the question 17, I read in a book that to check the number of injective functions, the number of elements in the codomain should be greater than or equal to the number of elements in the domain, making the expression for the number of injective functions to be n!/(n-m)! Please how about that?

[@Quirkydude0_0]

Use his method!

[@BakoMaths]

Hello Sir, please which type of writing pad do you use for your online tutorial videos

[@BERNARDOFFOETEYE]

Enhance your writing skills by focusing on clarity.

[@jamjam3448]

Thanks sir

[@kelvinboakye2115]

thank you sir

[@gyasiken12]

Thanks sir