f(x)=x2+4, f(x)=-x2+4, Which has an even degree but a negative a value?, Which has an odd degree and negative a value?, f(x) = x4+2x2-1/2, f(x) = - x3+3, Which of these functions has a negative discriminate?, Which of these functions has a positive discriminate?, f(x) = -x4+x2-2, Which of these functions has no real roots?

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