exam Maths Puzzle Numerical Ability

I do not know if my question belongs in this category. But it deals with inverse functions.

The function is f(x) =

1
----------------------
x^3 + 12x^2 + 48x + 4

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exam Other Question

A tennis coach has 16 players and 8 courts. And want to rank each of them from worst to best. show a solution that requires no more than 10 hours. If f(x) = -5x,then f(-3)