At what value of q is the concavity of w(q) = -2, if w(q) = q4 - 16?

1.	At what value of q is the concavity of w(q) = -2, if w(q) = q4 - 16?
A.	At q = 0.
B.	At q = fourth root of 14.
C.	Never; w(q) is always concave up.
D.	Never; w(q) is always concave down.
Answer» D. Never; w(q) is always concave down.

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At what value of q is the concavity of w(q) = -2, if w(q) = q4 - 16?

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