JEE Math Practice Question
If 3x + 4y = 12$$\sqrt 2 $$ is a tangent to the ellipse $${{{x^2}} \over {{a^2}}} + {{{y^2}} \over 9} = 1$$ for some $$a$$ $$ \in $$ R, then the distance between the foci of the ellipse is :
- A.$$2\sqrt 5 $$
- B.$$2\sqrt 7 $$
- C.4
- D.$$2\sqrt 2 $$
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