Solve.Find the focus and directrix of the parabola y2 - 4x + 2y + 5 = 0
A. F: (0, 1); D: y = 2
B. F: (5, 1); D: y = 3
C. F: (2, -1); D: x = 0
D. F: 
; D: y = 
Answer: C
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Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = cos3 x
A. y = cos u; u = x3; 
= - 3x2 sin(x3)
B. y = u3; u = cos x; 
= 3 cos2 x sin x
C. y = u3; u = cos x; 
= - 3 cos2 x sin x
D. y = cos u; u = x3; 
= - sin(x3)
Write as a percent. 1.86
A. 1860% B. 286% C. 2360% D. 186%
Use the graph to find the vertical asymptotes, if any, of the function. 
A. x = 2, y = 5 B. x = 2 C. y = 5 D. x = 2, x = 0
Locate relative maximum and relative minimum points on the graph. State whether each relative extremum point is a turning point.
A. No relative extrema. B. (4, 2) is a relative maximum and a turning point. C. (4, 0) is a relative maximum. D. (4, 2) is a relative minimum and a turning point.