Find the equation of the tangent line to the following curve at the given pointP. Illustrate by graphing the curve and the tangent line on the same screen.

1

what did I do wrong? please help!

Here are the steps:

I did it according to this Find the equation of the tangent line to the following curve at the given point P. ? - Yahoo! Answers

y`=6-2x^(1/2)

6-2(1)^(1/2)

y`=4

y-4=4(x-1)

y-4=4x-4

y`=4x (and it's WRONG T_T)

please help me thanks you!!!