![How possible for function to be $A \subset f^{-1} \left( f(A) \right) \forall f$? - Mathematics Stack Exchange How possible for function to be $A \subset f^{-1} \left( f(A) \right) \forall f$? - Mathematics Stack Exchange](https://i.stack.imgur.com/llxPc.jpg)
How possible for function to be $A \subset f^{-1} \left( f(A) \right) \forall f$? - Mathematics Stack Exchange
If the alphabets are coded as numbers such that A =1, B =2, C =3 and so on, then encode the given words.A. 17215514B. 81518195C. 101311D. 119147
![Let f = {(1, 1), (2, 3), (0, - 1), ( - 1, - 3)} be a function from Z to Z defined by f(x) = ax + b for some integers a, b . Determine a, b . Let f = {(1, 1), (2, 3), (0, - 1), ( - 1, - 3)} be a function from Z to Z defined by f(x) = ax + b for some integers a, b . Determine a, b .](https://i.ytimg.com/vi/bHJtjHukUaI/maxresdefault.jpg)