Mathematics Extension 1 2001 HSC Locus and parabola Question (1 Viewer)

boredofstudyinn

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Hey can some one please help me out with this Question

i dont understand

all 4 parts lol
 

kaz1

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i. y=x2/4a
dy/dx=x/2a sub x=2at
.'. gradient of tangent is and gradient of normal is -1/t
x+ty=k sub in point (2at,at2)
and you get k=at3 +2at
x+ty=at3 +2at

I'll do the rest later if no one else does them.
 

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