Question

5x^2+3y^2=16 what is the value of d^2y/dx^2 at the point (3,5)?

Answer 1

$10x + 6ym = 0 > > 30 + 30m = 0 > > m = - 1 \\ 10 + 6mm + 6yn = 0 > > 10 + 6 + 30n = 0 > > n = \frac{ - 16}{30}$
*y'=m and y"=n*