Points that a curve's normal line intersects

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SUMMARY

The discussion revolves around finding the intersection point of the normal line to the curve defined by the equation x² + 2xy - 3y² = 0 at the point (5,5). The participants successfully differentiated the equation to determine the slope at the specified point, leading to the formulation of the tangent and normal lines. A key insight was recognizing that the curve can be factored, simplifying the process of locating the additional intersection point of the normal line with the curve.

PREREQUISITES
  • Understanding of implicit differentiation
  • Familiarity with the concept of normal and tangent lines
  • Knowledge of factoring polynomial equations
  • Basic graphing skills for visualizing curves
NEXT STEPS
  • Study implicit differentiation techniques in calculus
  • Learn how to derive equations for tangent and normal lines
  • Explore factoring methods for polynomial equations
  • Investigate graphical representations of curves and their properties
USEFUL FOR

Students studying calculus, particularly those focusing on curve analysis and geometric interpretations of derivatives, as well as educators seeking to enhance their teaching strategies in these areas.

dustbin
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Homework Statement



The line that is normal to the curve x2+2xy-3y2=0 at (5,5) intersects the curve at what other point?

2. The attempt at a solution

I differentiated the equation, found the slope of the curve at that point, and I then found the equations for the tangent line and normal line. I'm not really sure where to approach from here... any hints?
 
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dustbin said:

Homework Statement



The line that is normal to the curve x2+2xy-3y2=0 at (5,5) intersects the curve at what other point?

2. The attempt at a solution

I differentiated the equation, found the slope of the curve at that point, and I then found the equations for the tangent line and normal line. I'm not really sure where to approach from here... any hints?

Have you noticed that ##x^2+2xy-3y^2\ ##factors? What does its graph look like? Finding where that normal line hits it again won't seem so difficult.
 
D'oh! I was looking way too hard. I can't believe I missed that.

Thanks for you time! I greatly appreciate it.
 

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