A value of the variable that makes the polynomial equal to zero (apex)
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Yes, a polynomial function is always continuous
No it is not
It is a polynomial if the square root is in a coefficient but not if it is applied to the variable. A polynomial can have only integer powers of the variable. Thus: sqrt(2)*x3 + 4*x + 3 is a polynomial expression but 2*x3 + 4*sqrt(x) + 3 is not.
A second-degree polynomial function is a function of the form: P(x) = ax2 + bx + cWhere a ≠ 0.
No. by definition, the polynomial should contain an integer as exponent and square root 1/2 is not an integer.