MATH 16A WORKSHEET 1-
(1) If f(x) = 3 and g(x) = x2, find f(g(7)) and g(f(7)).
(2) Find the equation of the line through (1, 1) and (2, 4). What is the x-coordinate of the point on this line whose y-coordinate is -8?
(3) Expand (x + 1)(x - 2). Factor x2 - 4x - 21.
(4) Find the domain of definition of the function f(x) = 1/√(x2-1).