1. Let f(x)=x^2 +1 and g(x)=x-3. Write an expression for f*g(x))
2. Let f(x)=x^2 -2x. Find all real numbers x such that f(x)=f(f(x))
3. Show that when the square of an odd integer is divided by 4, the remainder is always 1.
Double repost. I answered 2 and 3 here: