JEE Math Practice Question
Three circles of radii a, b, c (a < b < c) touch each other externally. If they have x-axis as a common tangent, then :
- A.a, b, c are in A.P.
- B.$$\sqrt a ,\sqrt b ,\sqrt c $$ are in A.P
- C.$${1 \over {\sqrt b }} + {1 \over {\sqrt c }}$$ = $${1 \over {\sqrt a }}$$
- D.$${1 \over {\sqrt b }} = {1 \over {\sqrt a }} + {1 \over {\sqrt c }}$$
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