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Which of following expressions is a polynomial? f(x)=1/5x^2+4.5x+2, f(x)=-3x^4+8x^2-2sqrtx+1, f(x)=-2.1x^7+3x^2+17/2x, f(x)=4/x-11x^2

Answer :

nobillionaireNobley
f(x) = 1/5 x^2 + 4.5x + 2 is a polynomial.

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