(a) Find the inverse of 7 mod 13, if it exists.                     (b)  Find the value of the Euler function

1) is the inverse of each of these functions a function? How do you know? 2) make a rough sketch of the inverse ( in a different color) on the same graph as original function.

Given the functions r(x) = 3x-5 and 9(x) – *+5 , prove these two functions are inverses using one of the compositions:O pts.) Show work here for full credt. 9[r(x)] =. OR r[9(x)] -

Consider the function: g(x) = * with the domain R\(5) (i.e. all real numbers except 5) and the image R\{1) (i.e. all real numbers except %3D 1). Find the expression for the inverse function g (x). Select one: O not in the list O (3+5x)/(x+1) O 3+5x O (x-5)/(x+3) • (3+5x)/(x-1) Clear my choice