Question

If the line y=2x+c
be a tangent to the ellipse \frac{{{x}^{2}}}{8}+\frac{{{y}^{2}}}{4}=1
, then c=
[MNR 1979; DCE 2000]
A) \pm 4 B) \pm 6 C) \pm 1 D) \pm 8

Answer 1

the answer to that question is B