17. Given a linear function /(x) = ax + b, where a = 0, when does fif (x)) = x? always C. at a unique value of x, depending on the function b. never d. at many possible values of x, depending on the function 18. Suppose f(x) = _ and g(x) = vx+10 . Which of these expressions is equivalent to g (f(-1))? b. c. 13 d. 9 19. If f(x) = log 4x and g(x) = x - 2, which of these expressions is equivalent to f (g(4))? a. log 4 x log 14 b. log' 16-2 C. log? 14 d. log 4 + log 14 20. If f(x) = log x and g(x) = , what is the domain of y = f (x)g(x)? (x ER [ x * -8 and x = 1} C. (x ER | x > 0 and x = 1} {x ER |x >0) d. {x ER | x > 0 andx # 8) 21. The remainder when 4x3 + 2x - 1 is divded by x + 2: a. 35 d. -37 C. -29 d. 0 22. The exact radian measure of 75 is: d. 5 12 b. F n C. 15 24 d. 23. The solution for = = 0 is: a. 12, -3 b. 4, -3 c. 12 d. no solution