Determine whether the given function is one-to-one. If it is one-to-one, find a formula for the inverse.f(x) = 2x2 - 5, x ? 0
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
D. Not one-to-one
Answer: A
Mathematics
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Find the standard equation of the parabola with the given focus and directrix.Focus: (0, -5); directrix: y = 3
A. x2 = 16(y + 1) B. y2 = -16(x + 1) C. y2 = 16(x + 1) D. x2 = -16(y + 1)
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Differentiate.f(x) = 
4
A. 
3
B. 
C. 
3
D. 
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Solve the problem. Round to the nearest tenth if necessary.Runners in a 24 km race run how many miles?
A. 12.0 mi B. 38.6 mi C. 15.0 mi D. 25.4 mi
Mathematics