Tori's

In this blog, I will review section 4-2 which deals with notations.
f(x) is notation.
When f(5) or f(y) or f(i^2) the notation means to plug what is in the parenthesis into the equation instead of x.
1.) The sum of f and g is: (f+g)(x)
2.) The difference of f and g is: (f-g)(x)
3.) The product of f and g is: (f x g)(x)
4.) The quotient of f and g is:(f/g)(x)

Composition Functions - Function inside of another function.
(f o g)(x)
(g o f)(x)

Find f(5) if f(x) equals 3x+7
3(5)+7=22

Find (g o f)(x) if f(x)=5x+1 and g(x)=x/-1
(5x+1)/-1= -5x-1