Determine whether the graph is the graph of a function.
A. function
B. not a function
Answer: A
Mathematics
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Use the limit definition of the partial derivative to compute the indicated partial derivative of the function at the specified point.Find 
at the point (-3, -8): f(x, y) = 2x2 + 5xy + 8y2
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Mathematics
Perform the indicated operation
Mathematics
Verify the identity.cos 4? = 2 cos2(2?) - 1
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Mathematics
Verify the identity.cot(? + ?) cot(? - ?) = 
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Mathematics