a. $f(x+1)$
b. $2(f(x-1))$
c. $-f(\frac{x}{2})$
d. $f(2(x-1))$
I know that for a. you have to move the function to the right one unit. I also know how to do c.. However, I have no idea how to do b. and d.. Can someone please explain to me how to do these two questions? Any help and/or solution is appreciated.