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The equation of common tangents to the e...

The equation of common tangents to the ellipse `x^(2)+2y^(2)=1 ` and the circle `x^(2)+y^(2)=(2)/(3)` is

A

`y=(sqrt(7))/(sqrt(2))+sqrt(3)`

B

`y=7x+ sqrt(3)`

C

`y=sqrt(7x)+ sqrt(2)`

D

none of these

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