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BigorU [14]
2 years ago
15

For the function below, find the vertex, axis of symmetry, maximum or minimum value, and the graph of the function.

Mathematics
2 answers:
const2013 [10]2 years ago
6 0
F(x) = x^2/2 + 2x + 1f(x) = 1/2 * (x^2 + 4x) + 1f(x) = 1/2 * (x^2 + 4x + 4) - 1/2 * (4) + 1f(x) = 1/2 * (x + 2)^2 - 1
The vertex is (-2, -1). The axis of symmetry is x = -2. The minimum value is -1. The maximum value is infinity.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

amm18122 years ago
3 0

Answer and Explanation :

Given : Function f(x)=\frac{x^2}{2}+2x+1

To find : The vertex, axis of symmetry, maximum or minimum value, and the graph of the function.

Solution :

The quadratic function is in the form, y=ax^2+bx+c

On comparing, a=\frac{1}{2} , b=2 and c=1

The vertex of the graph is denote by (h,k) and the formula to find the vertex is

For h, The x-coordinate of the vertex is given by,

h=-\frac{b}{2a}

h=-\frac{2}{2(\frac{1}{2})}

h=-\frac{2}{1}

h=-2

For k, The y-coordinate of the vertex is given by,

k=f(h)

k=\frac{h^2}{2}+2h+1

k=\frac{(-2)^2}{2}+2(-2)+1

k=2-4+1

k=-1

The vertex of the function is (h,k)=(-2,-1)

The x-coordinate of the vertex i.e. x=-\frac{b}{2a} is the axis of symmetry,

So, x=-\frac{b}{2a}=-2 (solved above)

So, The axis of symmetry is x=-2.

The maximum or minimum point is determine by,

If a > 0 (positive), then the parabola opens upward and the graph has a minimum at its vertex.

a=\frac{1}{2} >0 so,  the parabola opens upward and the graph has a minimum at its vertex.

The Minimum value is given at (-2,-1)

Now, We plot the graph of the function

At different points,

x          y

-4        1

-2        -1

0         1

Refer the attached figure below.

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