Determine where the given function is concave up and where it is concave down. f(x) = 2x3 + 12x2 + 18x
A. Concave down on 
, concave up on 
B. Concave up on 
, concave down on 
C. Concave down on (-?, -3.5), concave up on ( -3.5, ?)
D. Concave up on ( -?, -3.5), concave down on ( -3.5, ?)
Answer: A
Mathematics
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Sketch the surface z = f(x,y).f(x, y) = 
A. 
B. 
C. 
D. 
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Provide an appropriate response.Explain in your own words why 
? a when a is negative.
What will be an ideal response?
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Answer the question.The points (-6, -3) and (6, 5) are the points at which the diagonal of a square intersects the square. What are the coordinates of the center of the square?
A. (0, 1) B. (1, 2) C. (0, 2) D. (1, 1)
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Indicate whether the ordered pair is or is not a solution to the given system.
(2, -6)
A. Solution B. Not a solution
Mathematics