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Here is a link to the questions:Equation of tangent and normal?

1.find the equation of the tangent and normal to the curve y = x/a+a/x at (a/2, 5/2)

2. at what point of the parabola y=x^2-3x-5 is the tangent line parallel to 3x-y=2? find the eqn of the tangent line.

3. find the eqn. of the line normal to the curve y=3x^5+10x^3+15x+1 at its point of inflection.

4. find the critical points and the points of inflection of the curve y= 3x^4-8x^3+6x^2

please show your solution. help me. thanks!

Equation of tangent and normal? - Yahoo! Answers

I have posted a link there to this topic so the OP can find my response.