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A. determine whether the following are polynomial function or not. Write P if it is a polynomial function and NP if it is not.

1) f(x)= 5x-1
2) g(x)= 6x^2+ 5
3) P(x)=5x^-2 -3x+5
4) f(x)=3x^5+4x^3- 2x+2
5) g(x)=9+3x10\sqrt()x