Let a be a real number such that a + _ = 4. Find the value of the given expressions. (Note. They are integers.) (a) a2 + (b ) as + =For any positive real number a > 0, how many distinct real roots does the equation x - a = 0 have?In the following figure, we plot the graphs of y = x, y = x , y = x , y = a andy = x2 defined on [0, 1]. In particular, g and p are graphs of y = a and y = a respectively. Please determine (a, b). (1, 1) h f p a (0, 0) 0.5 (a, b) = v [MEH ] [ MEN ] 1 1/2 1/3Which of the followings represents the graph of y = cos (2ac)? [ MEN ] AT50 By = 2 cos x MERE? Which of the followings represents the graph of y = 2 cos x? [ MEH ] MATAASENy = COS (47 - 2x) JEFF ? Which of the followings represents the graph of y = cos (47 - 2x)? [ MEH ]