- #1

gillgill

- 128

- 0

1) y^2-3xy+x^2=7

y'=3y-2x/2y-3x

2) x^2+y^2=2xy

y'=1

3) 2x^2+xy+3y^2=0

y'=-4x-y/x+6y

4) 5x^2-2xy+7y^2=0

y'=y-5x/7y-x

5) 7x^2+6xy+9y^2=0

y'=-7x-3y/3x+9y

6) Find the equation of the tangent line to the graph of x^2+2y^2=3 at (1,1)

ans: x+2y-3=0

7) Find the equation of the tangent line to the graph of x^2+3y^2=4 at (1,1)

ans: x+3y-4=0

are those correct?

Thanks for your time