Find the linearization L(x) of f(x) at x = a. f(x) = cos x, a = 0 O L(x) = 0 O L(x) = 1 O L(x) = -1 O L(x) = 4x + 1 Question 5 6 pts Express the relationship between a small change in x and the corresponding change in y in the form dy = f'(x) dx. y = xv5x + 8 O dy = _ 15x+16 dx 2v5x+8 O dy = 15x -16 dx V5x+8 O dy = 15x+16 dx V5x+8 O dy = 15x-16 dx 251+8