Question 320754
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The *[tex \Large x]-coordinate of the vertex of a parabola expressed in the form *[tex \Large f(x)\ =\ ax^2\ +\ bx\ +\ c] is given by:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x_v\ =\ \frac{-b}{2a}]


The *[tex \Large y]-coordinate of the vertex is the value of the function at that point, i.e.:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ y_v\ =\ f(x_v)\ =\ f\left(\frac{-b}{2a}\right)]



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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