What is the vertex of the function f(x) =1/2 x2 + 3x + 3/2 ?
Solution:
The given function is the equation of the parabola of the general form of equation f(x) = ax2 + bx + c and its graph is shown below:
The vertex of the equation of the form f(x) = ax2 + bx + c is given by the formula:
-b/2a
For the given equation 1/2 x2 + 3x + 3/2:
a = 1/2 ; b = 3 and c = 3/2
The x coordinate of the vertex is given by :
x = -3/(2)(1/2) = -3
The value of y coordinate is therefore given by substituting the value of x in the given quadratic equation 1/2 x2 + 3x + 3/2:
y = (1/2)*(-3)2 + 3(-3) + 3/2
y = (1/2)(9) - 9 + 3/2
= 4.5 - 9 - 1.5
= -3
The coordinates of the vertex of the given equation is given by (-3, -3) which is also revealed by the given graph.
What is the vertex of the function f(x) =1/2 x2 + 3x + 3/2 ?
Summary:
The vertex of the function f(x) =1/2 x2 + 3x + 3/2 is given by the coordinates (-3, -3)
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