4 votes 4 votes Let f : A → B be function, where A = {1,2,3,4,5,6} and B = {1,2,3,4,5}. If f(1) = 4 then how many surjective (onto) functions are possible ? Set Theory & Algebra zeal set-theory&algebra functions zeal2019 + – Prince Sindhiya asked Nov 11, 2018 • edited Mar 6, 2019 by ajaysoni1924 Prince Sindhiya 1.3k views answer comment Share Follow See all 7 Comments See all 7 7 Comments reply Shaik Masthan commented Nov 27, 2018 reply Follow Share @Prince Sindhiya type the questions instead of screenshots https://gateoverflow.in/blog/5823/screenshot 0 votes 0 votes Prince Sindhiya commented Nov 27, 2018 reply Follow Share @shaik i access GO most of the time from mobile phone and i am not good with latex symbols even many times i tried when i was a new user but it took around 45 mins to 1 hour in typing the solutions to answering and all screenshot i posted are visible so i started Posting questions by taking the screenshot 0 votes 0 votes Prince Sindhiya commented Nov 27, 2018 reply Follow Share But from now onwards for simple question i will type the question 0 votes 0 votes Shaik Masthan commented Nov 27, 2018 reply Follow Share for solutions no need, atleast for questions you can do that, hardly it take 5 min... click on fx button, there you will type, no need to manually write the latex code. searching By images is more difficult when we are finding duplicates... 0 votes 0 votes Magma commented Nov 27, 2018 reply Follow Share can you tell me that how to subscript and superscript ? I didn't find that func button in this updated version 0 votes 0 votes Shaik Masthan commented Nov 27, 2018 reply Follow Share check this 1 votes 1 votes Magma commented Nov 27, 2018 reply Follow Share Ohk fine :p earlier it was bit easy because both function are very frequently use so sir make a separate button for this two func btw thanks 0 votes 0 votes Please log in or register to add a comment.
Best answer 6 votes 6 votes related theory https://math.stackexchange.com/questions/334420/number-of-onto-functions formula derivation is in given link Gurdeep Saini answered Nov 11, 2018 • selected Nov 11, 2018 by Prince Sindhiya Gurdeep Saini comment Share Follow See all 18 Comments See all 18 18 Comments reply Show 15 previous comments Shaik Masthan commented Nov 27, 2018 reply Follow Share @Gurdeep Saini who just down vote but didn't participate in the discussion, doesn't get this comment as notification 0 votes 0 votes Gurdeep Saini commented Nov 27, 2018 reply Follow Share @Shaik Masthan he/she should give the reason what is wrong in this answer 0 votes 0 votes Shaik Masthan commented Nov 27, 2018 reply Follow Share we can't do anything... it's his/her responsibility.... forget about it.. there is No problem with this solution 1 votes 1 votes Please log in or register to add a comment.