If `ax ^(2) + 2hxy + by ^(2) =1` then `(hx + by) ^(3) y _(2) =`

If ax^(2)+2hxy+by^(2)=1, then (d^(2)y)/(dx^(2)) is (a) (h^(2)-ab)/((hx+by)^(2))( b) (ab-h^(2))/((hx+by)^(2))(h^(2)+ab)/((hx+by)^(2)) (d) none of these

If ax^(2)+2hxy+by^(2)=0, then (dy)/(dx) is equal to (y)/(x)( b) (x)/(y)(c) ,None of these

If ax^(2)+2hxy+by^(2)=0,"show that "(d^(2)y)/(dx^(2)) =0

If ax^(2)+2hxy+by^(2)=0,"show that "(d^(2)y)/(dx^(2))=0

If ax^(2) + 2hxy + by^(2) + 2gx + 2f y + c = 0 , then show that (dy)/(dx).(dx)/(dy)=1