Find the inverse of the function.f(x) = -x2 + 20, x ? 0
A. f-1(x) = x2 + 20
B. f-1(x) = 
C. f-1(x) = - 
D. f-1(x) = 
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
E. 
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = cos
A. 0
B. 1
C. 
D. No limit
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the x-axis.x = 4y2, x = - 4y, y = 4
A. 
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B. 
?
C. 
?
D. 
?
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Solve the quadratic equation.x(x - 1) = 20
A. {-4, 5} B. {4, 5} C. {-5, -4} D. {1, 20}
Mathematics