Compute the gradient of the function at the given point.
A. -2i + 3j
B. 8i - 6j
C. -4i - 2j
D. 8i + 6j
Answer: C
Mathematics
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Find the indicted product and simplify if possible.The amount of material required to make a spherical shell is given by 
(R - r)(R2 + Rr + r2).
A. 
R3 + 
R2r + 
Rr2 + 
r3
B. 
R3 - 
R2r + 
Rr2 - 
r3
C. 
R3 - 
r3
D. 
R3 - r3
Mathematics
Solve the equation by completing the square.x2 - x = 9
A. 
B. 
C. 
D. 
Mathematics
Use the graph of the rational function f(x) to complete the statement.As x?-2+, f(x)? 
. 
A. 0 B. -? C. -2 D. +?
Mathematics
Write with positive exponents only.
-4
A. 
B. 
C. - 
D. - 
Mathematics