What are Injective, Surjective & Bijective Functions? - Dr Douglas K. Boah (Shamalaa Jnr/Archimedes)

MATHEMATICS TUTORIAL FOR STUDENTS AT THE SECONDARY AND TERTIARY LEVELS.

[@richardquainoo4047]

God bless you sir

[@uchechipatience4439]

Thank you sir

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Sir i honestly love your videos. You give so many good examples and i really appreciate this help!

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Very proud of you Sir. I'm a class of 2017.

[@luckywhite7241]

Great work Sir

[@gnation855]

God bless you sir.

[@billharperofficial3547]

Nice one

[@stewartgarikayi4560]

Thank you

[@temomatutu4965]

The second solution worked is wrong. Because we were just give x>0 . Not to use it at the end. Since we got two values being a=b and a=-b . The function is not injective

[@kelvinmutukumuthama3624]

what happened to x^2=b^2🤔🤔🤔

[@educamp6009]

Good

[@k.e.l.obeats563]

Sir thanks for the lecture. But sir I'm still confused; are you saying an injective function is the same as a bijective function?

[@profshamalaajnrphd]

No please.

[@jamesrobert6309]

Thanks sir