Identify the lines about which the figure has reflective symmetry.
A. k, m, and n
B. k, l, m, and n
C. l and n
D. n only
Answer: D
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Use implicit differentiation to find dy/dx and d2y/dx2.xy + 3 = y, at the point (4, -1)
A. 
= 
; 
= 
B. 
= - 
; 
= 0
C. 
= 3; 
= - 24
D. 
= 
; 
= - 
Find the nth term an of the geometric sequence.an = 
; 4, - 
, 
, . . . .
A. n = 5 B. n = 10 C. n = 12 D. n = 7
Express the area of the region bounded by the given line(s) and/or curve(s) as an iterated double integral.The curve 
and the lines 
and 
A. 
B. 
C. 
D. 
Determine the vertex, focus, and directrix of the parabola and sketch its graph.(y - 2)2 = (x + 2)
A. vertex: (-2, 2)
focus: (-1.75, 2)
directrix: x = -2.25
B. vertex: (-2, 2)
focus: (-2, 2.25)
directrix: y = 1.75
C. vertex: (-2, 2)
focus: (-1.75, 2)
directrix: x = -2.25
D. vertex: (2, -2)
focus: (2, -1.75)
directrix: y = -2.25