Show that the tangent to P: y= a(x-h)^2 + k at point T, where x= alpha, is y=2a(alpha-h)x+k-a(alhpa^2-h^2).

Thank you for any help

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- May 15th 2009, 02:42 PMslaypullingcatfinding tangent
Show that the tangent to P: y= a(x-h)^2 + k at point T, where x= alpha, is y=2a(alpha-h)x+k-a(alhpa^2-h^2).

Thank you for any help - May 15th 2009, 03:01 PMScott H
Hint: If

then

- May 15th 2009, 03:02 PMmr fantastic
- May 15th 2009, 07:52 PMslaypullingcat
I am using m=2a(x-h), x1=alpha and y1=a(alpha-h)^2 +k. I'm getting fairly close but its still not correct. Are my substitution values right? If so I guess I am simplifying incorrectly

- May 16th 2009, 03:46 AMmr fantastic