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Maths Puzzle
Numerical Ability
1)Find x ito 4 decimal places: Ln x-4ln=Ln(5/x)
2)if 4^x=4^2 then x= ?
3)if f(x)=sqrtx-2 then f^-1(x) is equal to?
4)what are the possible real zeros of the polynomial:6x^3+13
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