Find the largest open intervals where the function is concave upward.f(x) = x3 - 3x2 - 4x + 5
A. (1, ?)
B. (-?, 1)
C. None
D. (-?, 1), (1, ?)
Answer: A
Mathematics
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Determine whether the given function satisfies a Laplace equation.f(x, y) = 
A. Yes B. No
Mathematics
Evaluate the improper integral.
A. 6 B. -36 C. -6 D. 36
Mathematics
Provide an appropriate response.
If C(x) = 7x + 1,000 and A(x) = 
, R(x) = $20x, and P(x) = R(x) - C(x), then if x = 200, P(x) =
A. 1,200 B. 1,400 C. 1,800 D. 1,600
Mathematics
Solve the system.
A. x = 3, y = -2, z = 5 B. x = 0, y = 4, z = 2 C. x = -1, y = 2, z = -3 D. x = 1, y = 2, z = 3
Mathematics