Maths 1A Functions Theorem 5 Explanation

Let 𝑓:𝐴→𝐵 be a function. Then 𝑓 is a bijection if and only if there exists a function 𝑔:𝐵→𝐴 such that 𝑓𝑜𝑔=𝐼_𝐵 and 𝑔𝑜𝑓=𝐼_𝐴 and, in this case, 𝑔=𝑓^(−1) For more Theorems of Functions: https://youtube.com/playlist?list=PLxMil6gjB3b2S5csyZzjg7JPXCx9kdBYz Maths 1A Important 7 Marks Questions Playlist: https://www.youtube.com/playlist?list=PLxMil6gjB3b20Ju6p1ziL0RKQPS_QbNOL Maths 1A Mathematical Induction Questions: https://youtube.com/playlist?list=PLxMil6gjB3b0xJwL5MCtXo7F8mmWiiFUS Maths 1A Trigonometry Important LAQ: https://youtube.com/playlist?list=PLxMil6gjB3b1fGEYUUDkSl2mbj8Bm8ncU Maths 1B Pair of Straight Lines LAQ: https://youtube.com/playlist?list=PLxMil6gjB3b2qH2beiGl5aKIEpoY5Szxu Maths 1B Locus Questions: https://youtube.com/playlist?list=PLxMil6gjB3b1YP0TS5eyknCnDOOw49mM8 #functions #theorem #maths1a #functionstheorem #important #importantquestion #inter1styear #inter1styearmaths #class11 #compositefunction #compositefunctions #inversefunction #intermediatemaths