1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Find the equation of the normal to the graph at M(2,1)

  1. Jan 14, 2009 #1
    if:
    2x3+8lny+x3ey-16-8e=0

    what i did was
    dy/dx=[tex]\dot{y}[/tex]

    6x2+8(1/y)[tex]\dot{y}[/tex]+3x2ey+x3ey[tex]\dot{y}[/tex]=0

    [tex]\dot{y}[/tex]=-(x2(6+3ey)/(8/y+x3ey)

    then to find the incline of the normal, m=-1/[tex]\dot{y}[/tex]

    so at(2,1)

    [tex]\dot{y}[/tex]=-3(2+e)/2(1+e)

    m(N)=2(1+e)/3(2+e)

    does this seem right??

    Y-1=[2(1+e)/3(2+e)]{x-2}
     
  2. jcsd
  3. Jan 14, 2009 #2
    Yes, it's correct.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...