Three circles of radii a, b, c touch... | Circles

JEE Main 2019

9-01-2019 S1

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

Select the correct option:

a, b, c are in A.P.

$\frac{1}{\sqrt{a}}=\frac{1}{\sqrt{b}}+\frac{1}{\sqrt{c}}$

$\sqrt{\mathrm{a}}, \sqrt{\mathrm{b}}, \sqrt{\mathrm{c}}$ anr in A.P

$\frac{1}{\sqrt{b}}=\frac{1}{\sqrt{a}}+\frac{1}{\sqrt{c}}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Mathematics

Hard

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