Question
Asked Feb 14, 2019
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Help solving it

lT-Mobile
9:41 PM
24% D.
my.tccd.edu
3
f(x) - 2x6
- 4x +
End Behavior.
Vertex:
Y - intercept:
X -intercepts:
Domain:
Range:
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lT-Mobile 9:41 PM 24% D. my.tccd.edu 3 f(x) - 2x6 - 4x + End Behavior. Vertex: Y - intercept: X -intercepts: Domain: Range:

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Expert Answer

Step 1
  • End Behavior:

As the leading term, it means the polynomial which has the highest power of the variable is 2x2, which is an even term, it will always have the positive values for any value of x.

It means that f(x)→∞ as x→ -∞ and f(x)→∞ as x→∞

The graph of the function is shown on the board:

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Step 2
  • Vertex:

The function is the form of parabola, according its definition it is given as:

y=ax2+bx+c, its vertex is given as x=-b/2a

As the given function is f(x)= 2x2-4x+6,

here a=2, b=-4, c=6

therefore, vertex calculation is shown on the board:

Therefore, the vertex is given for the function is (1,4).

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Step 3
  • Y-intercept:

y-intercept is a point on the graph where x=0

f(x)= 2x2-4x+6 when x=0

f(x) = 6

So, its y- intercept is (0,6).

 

  • X-intercepts:

x-intercept is a point on the graph where y=0

To determine its intercept we calculate its discriminant, for polynomial function its discriminant is calculated as b2-4ac.

Here, a=2, b=-4, c=6

D= (-4)2-4 X 2 X 6=-32

Discriminant cannot be negative for x € R...

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