How Do You Find the Vertex and Axis of Symmetry in a Parabola Equation?

  • Thread starter Thread starter Alain12345
  • Start date Start date
  • Tags Tags
    Conics Parabola
AI Thread Summary
To find the vertex of the parabola given by the equation (y-2)² = 4(x-3), identify the vertex at the point (3, 2). The axis of symmetry is the line x = 3, indicating that the parabola opens horizontally. The positive right-hand side of the equation confirms that the parabola opens to the right. The distance p, which is 1, represents the distance from the vertex to the focus. Understanding these elements allows for a clear analysis of the parabola's properties.
Alain12345
Messages
37
Reaction score
0
If I am given (y-2)2= 4 (x-3), how would I find the vertex, equation of the axis of symmetry, and the direction of the opening? I'm guessing that I have to use PF=PD, but it's confusing because it looks different from other things that I have done involving PF=PD.

Thanks.
 
Physics news on Phys.org
the right hand side of your equation is positive right?, what is the minimum value of x for which this is posible? and the corresponding value of y? this is the vertex. Now rebember that p=1 is the distance from the vertex to the focus and that you have and horizontal parabola.
 
I tried to combine those 2 formulas but it didn't work. I tried using another case where there are 2 red balls and 2 blue balls only so when combining the formula I got ##\frac{(4-1)!}{2!2!}=\frac{3}{2}## which does not make sense. Is there any formula to calculate cyclic permutation of identical objects or I have to do it by listing all the possibilities? Thanks
Since ##px^9+q## is the factor, then ##x^9=\frac{-q}{p}## will be one of the roots. Let ##f(x)=27x^{18}+bx^9+70##, then: $$27\left(\frac{-q}{p}\right)^2+b\left(\frac{-q}{p}\right)+70=0$$ $$b=27 \frac{q}{p}+70 \frac{p}{q}$$ $$b=\frac{27q^2+70p^2}{pq}$$ From this expression, it looks like there is no greatest value of ##b## because increasing the value of ##p## and ##q## will also increase the value of ##b##. How to find the greatest value of ##b##? Thanks
Back
Top