Find F(x) = 3x + 4x - 2. Find f (3) Find f(a), an expression of a. Find f (x+h), an expression of x and h. Find f(x+h)-f(x), an expression of x and h. Simplify. Suppose h does not equal zero, find: f(x+h)-f(x) / h, an expression of x and h. Simplify.