Calculate the flux of the field F across the closed plane curve C.F = yi - xj; the curve C is the circle (x - 9)2 + (y - 9)2 = 121
A. -198
B. 0
C. 396
D. 198
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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Provide an appropriate response.If f(x) = e(4x+1)2, then f'(x) =
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Mathematics