LorialwhsMika LorialwhsMika
  • 24-11-2016
  • Mathematics
contestada

consider the point (x,y) lying on the graph of y=(x+3)^1/2. let L be the distance between the points (x,y) and (4,0). write l as a function of y

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alsteva alsteva
  • 26-11-2016
[tex]L=\sqrt{ (x-4)^2 + y^2 }[/tex]
and 
[tex]y=\sqrt{x+3} \Rightarrow x = y^2-3[/tex]

[tex]L=\sqrt{ (x-4)^2 + y^2 }=\sqrt{ (y^2 - 3-4)^2 + y^2 }=\sqrt{ (y^2-7)^2 + y^2 }[/tex]


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