Find the second-order partial derivative.Find fxx, where f(x, y) = x4y5 + x5y.
A. 20y3
B. 12x2y5 + 20x3y
C. 4x3y5 + 5x4y
D. 12x2y5 + 20x3
Answer: B
Mathematics
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Find the equation for the level surface of the function through the given point.f(x, y, z) = 
, (7, 2, 3)
A. 
= 
B. 
= 
C. The level surfaces cannot be determined.
D. 
= 
Mathematics
Add.
A. 162 B. 163 C. 153 D. 164
Mathematics
Graph the solution of the system.3x - 2y ? 6 x - 1 ? 0
A. 
B. 
C. 
D. 
Mathematics
Solve.k + 
= 
A. k = 1
B. k = - 
C. k = 
D. k = 
Mathematics